International Gem Society

Articles by International Gem Society

A Step-Cut Montana Sapphire Design

A Step-Cut Montana Sapphire Design

Watch lapidarist Jim Buday facet a step-cut Montana sapphire design. This version of the traditional cut produces a very bright...
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How Old Is My Zircon?

How Old Is My Zircon?

Is zircon the oldest mineral? Find out why zircon is important for scientifically dating rocks and how to learn how...
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What’s the Difference Between Gemology and Mineralogy?

What’s the Difference Between Gemology and Mineralogy?

There are key differences between gemology and mineralogy. Learn about these disciplines and how studying mineralogy can benefit gemologists.
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Cleo Eye Gemstone Design for a Moissanite

Cleo Eye Gemstone Design for a Moissanite

https://vimeo.com/891998005?share=copy Check out the full-length video on the International Gem Society YouTube Channel. Jim Buday takes you step by step through...
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Void Reaver Gem Design for a Lab-Created Alexandrite

Void Reaver Gem Design for a Lab-Created Alexandrite

https://vimeo.com/848434700?share=copy Check out the full-length video on the International Gem Society YouTube Channel. About Jim Buday Jim Buday was born and...
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D20 Gemstone: a Dungeons and Dragons-Inspired Design

D20 Gemstone: a Dungeons and Dragons-Inspired Design

https://vimeo.com/839864900?share=copy Check out the full-length video on the International Gem Society YouTube Channel. About Jim Buday Born and raised in...
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Appraising Turquoise: Challenges for Gemologists

Appraising Turquoise: Challenges for Gemologists

What do gemologists need to know when appraising turquoise? Learn what are the main value factors to consider and the...
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Turquoise Treatments and Synthetics Guide

Turquoise Treatments and Synthetics Guide

Almost all turquoises receive enhancements for jewelry use. Learn how to identify the most common turquoise treatments and synthetic options....
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Traditional Turquoise Jewelry Styles

Traditional Turquoise Jewelry Styles

People have prized turquoise jewelry for millennia. Learn about these traditional turquoise designs that still influence modern artisans.
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How to Cut a Moissanite: Rupee Step Cut

How to Cut a Moissanite: Rupee Step Cut

https://vimeo.com/video/861664423 Check out the full-length video on the International Gem Society YouTube Channel. About Jim Buday Born and raised in...
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Turquoise Color and the Color Turquoise

Turquoise Color and the Color Turquoise

Is all turquoise turquoise color? Learn about this gem's most popular natural colors and how people have prized them for...
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Turquoise Care Guide

Turquoise Care Guide

Beautiful turquoises tend to show wear over time. Our turquoise care guide will show you the best ways to clean...
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How Do Turquoises Form?

How Do Turquoises Form?

Turquoise gems can show many beautiful variations. Learn how turquoises form and how geology affects their color, shape, and durability....
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16 Black Gemstones (How Many Do You Know?)

16 Black Gemstones (How Many Do You Know?)

Some black gemstones are so well-known their names have become synonymous with the color black. Others are less well-known by...
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What are Balas Rubies and Ruby Spinels?

What are Balas Rubies and Ruby Spinels?

For centuries, balas rubies were prized by royalty. Learn what happened after gemologists identified these gems as red spinels instead....
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Four Famous Spinels

Four Famous Spinels

Although the world’s most famous spinels are named “rubies,” these gems are distinct species. Learn the stories behind four of...
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How Do Spinels Form?

How Do Spinels Form?

Available in many colors, spinels are becoming more popular with consumers. Learn how spinels form and how these gemstones get...
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Spinel Inclusions

Spinel Inclusions

The materials trapped inside gems hold a wealth of information. Learn what the most common types of spinel inclusions reveal...
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What are Cobalt Spinels?

What are Cobalt Spinels?

Learn how gemologists identify cobalt spinels and what qualities you should look for when buying these beautiful, vivid blue gemstones....
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Choosing a Spinel Engagement Ring Stone

Choosing a Spinel Engagement Ring Stone

Our spinel engagement ring stone guide can help you learn about this beautiful, colorful, durable, but little-known gemstone.
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Spinel Treatments and Enhancements

Spinel Treatments and Enhancements

Spinels are rarely treated, but gemologists should know how to detect spinel treatments. Learn about filling, heating, and diffusion.
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Anniversary Gifts By Year

Anniversary Gifts By Year

The anniversary gift for year 1 is gold, and the anniversary gift for year 2 is garnet. Our chart tells...
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Does Synthetic Jade Exist?

Does Synthetic Jade Exist?

You might find synthetic jade for sale, but is this material really lab-made jade or something else? Learn how to...
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Distinguishing Common Jade Lookalikes

Distinguishing Common Jade Lookalikes

Our table comparing the properties of jade lookalikes with natural jade will help gemologists distinguish authentic jade from simulants.
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Is Xinjiang Nephrite Banned in the US?

Is Xinjiang Nephrite Banned in the US?

How does the Uyghur Forced Labor Prevention Act of 2021 affect imports of Xinjiang nephrite jade from China? Learn what...
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Jade Color Trade Names

Jade Color Trade Names

Jade color trade names describe prized hues and patterns in jadeite and nephrite stones. Learn about the most popular and...
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Do the 2021 US Myanmar Sanctions Affect the Jade Trade?

Do the 2021 US Myanmar Sanctions Affect the Jade Trade?

What do the 2021 Myanmar sanctions cover and will they affect the jade trade? Learn about the origins, scope, and...
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Nephrite Jade Value, Price, and Jewelry Information

Nephrite Jade Value, Price, and Jewelry Information

Nephrite is one of the two distinct minerals commonly known as jade. While nephrite doesn't match the variety or the...
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Jade Engagement Ring Guide

Jade Engagement Ring Guide

Jade is an elegant choice for an engagement ring stone. Our jade engagement ring guide will show you how to...
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Maw Sit Sit Guide

Maw Sit Sit Guide

Learn everything you need to know about maw sit sit, a rare, vibrant green gem rock used to make beautiful...
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Jade Sources

Jade Sources

Jadeite and nephrite occur all over the world. Learn about the most notable and productive gem-quality jade sources..
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Nephrite Jade Carvings from Ancient China

Nephrite Jade Carvings from Ancient China

Nephrite jade carvings can teach us about Ancient China. See how ideas of transformation are reflected in numerous ritual objects....
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Jade Toughness and Care

Jade Toughness and Care

Jade toughness is legendary. However, this gem isn’t indestructible. Learn what makes jadeite and nephrite so tough and how to...
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How Does Jade Form?

How Does Jade Form?

The minerals known as jade, jadeite and nephrite, appear similar but have different properties. Learn how these materials form geologically....
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Variscite Value, Price, and Jewelry Information

Variscite Value, Price, and Jewelry Information

With beautiful green to blue-green colors and interesting patterns, variscite is a popular hobbyist material for cabochons.
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Does Chrysoprase Jewelry Fade?

Does Chrysoprase Jewelry Fade?

Should you wear chrysoprase jewelry only at night to protect the gem’s striking green color? Learn the facts here.
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Legrandite Value, Price, and Jewelry Information

Legrandite Value, Price, and Jewelry Information

Too soft for jewelry use, legrandite is a popular collector’s mineral because of its intense yellow color and aesthetic crystal...
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Sapphire Symbolism

Sapphire Symbolism

Beautiful blue colors and the star stone effect have influenced sapphire symbolism through the ages. Learn more about the legends...
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Smithsonite Value, Price, and Jewelry Information

Smithsonite Value, Price, and Jewelry Information

Smithsonite occurs across the globe, but facetable crystals are extremely rare. These gems can show a wide range range of...
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Vivianite Value, Price, and Jewelry Information

Vivianite Value, Price, and Jewelry Information

Vivianite is so fragile and soft, any faceted gems would be difficult to handle safely, let alone wear. Nevertheless, its...
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Can You Identify Gems Without Seeing Gemstone Colors?

Can You Identify Gems Without Seeing Gemstone Colors?

Did you know most gem species can be distinguished without the element of color? Learn the role gemstone colors play...
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Eudialyte Value, Price, and Jewelry Information

Eudialyte Value, Price, and Jewelry Information

Although lapidaries can cut cabochons and decorative objects from massive or translucent eudialyte crystals, transparent material suitable for faceting is...
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Price and Value: Factory-Cut vs Custom-Cut Gemstones

Price and Value: Factory-Cut vs Custom-Cut Gemstones

How does faceting affect gem value? Unique custom-cut gemstones command high prices. Learn how custom cutting compares to factory cutting....
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Onyx Value, Price, and Jewelry Information

Onyx Value, Price, and Jewelry Information

For millennia, artisans have carved intricate cameos from black-and-white onyx. Solid black onyxes, faceted or cabbed, are also popular jewelry...
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Peridot Buying Guide

Peridot Buying Guide

Our peridot buying guide can help you learn how these gems are graded, what to avoid, and how to identify...
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What are Lab-Grown Sapphires?

What are Lab-Grown Sapphires?

Learn how lab grown sapphires are made and how gemologists can distinguish natural from synthetic sapphires.
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Covellite Value, Price, and Jewelry Information

Covellite Value, Price, and Jewelry Information

Although covellite has attractive blue colors and shows iridescence, this rare mineral is difficult to cut. You can scratch it...
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Sphalerite Buying Guide

Sphalerite Buying Guide

Our sphalerite buying guide can help you learn how these gems are graded, what to avoid, and how to identify...
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Bytownite Value, Price, and Jewelry Information

Bytownite Value, Price, and Jewelry Information

Although bytownite occurs throughout the world, this feldspar variety is rarely encountered in gem-quality condition.
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Villiaumite Value, Price, and Jewelry Information

Villiaumite Value, Price, and Jewelry Information

A little-known and rare collector’s gemstone, villiaumite is very difficult to facet. Its toxicity also makes it inadvisable to handle...
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Gemstone Faceting Terms: A Glossary for Students

Gemstone Faceting Terms: A Glossary for Students

A glossary of frequently encountered gemstone faceting terms for the student gemologist. Our list covers gemology, gem cutting, and equipment....
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Choosing the Best Faceting Wax for Your Task

Choosing the Best Faceting Wax for Your Task

Faceting wax or dop wax comes in different colors with different melting points. Learn how to choose the wax best...
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September Birthstone: Sapphire

September Birthstone: Sapphire

What is the birthstone for September? The birthstone for September is sapphire. Sapphires are members of the gem species corundum....
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The World’s Largest Emeralds

The World’s Largest Emeralds

Emerald crystals can grow very large. Learn about some of the world’s largest emeralds, whether rough, faceted, or carved.
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Heliodor Value, Price, and Jewelry Information

Heliodor Value, Price, and Jewelry Information

Heliodor is a member of the beryl family. This stone is known for its range of yellow colors — from...
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Fantasy Gem Designs: Cutting Techniques

Fantasy Gem Designs: Cutting Techniques

Fantasy gem designs combine elements from faceted and cabbed stones as well as artistic embellishments. Learn the basics of this...
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Emerald Origins: History and Identification

Emerald Origins: History and Identification

Emeralds from different sources can vary in quality. Learn how to identify emerald origins by analyzing the optical and physical...
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Proustite Value, Price, and Jewelry Information

Proustite Value, Price, and Jewelry Information

Proustite crystals have magnificent red colors and good brilliance. Although facetable, they're too soft for jewelry use but highly desired...
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How to Facet Gems

How to Facet Gems

What does it take to facet gems? Patience and HAI, locking the gem at the right height, angle, and index...
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Wulfenite Value, Price, and Jewelry Information

Wulfenite Value, Price, and Jewelry Information

Although aesthetically magnificent wulfenite crystals are often too thin, soft, and sensitive to cut for jewelry, rare faceted pieces are...
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Gold Refining Advice for Jewelers

Gold Refining Advice for Jewelers

Before you turn the alloyed gold you got a great deal on into gold jewelry, carefully consider what gold refining...
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What are Black Diamonds and Carbonados?

What are Black Diamonds and Carbonados?

Most black diamonds used in jewelry are enhanced, but natural black-colored diamonds do exist. Learn more about these as well...
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Rutile Value, Price, and Jewelry Information

Rutile Value, Price, and Jewelry Information

Though perhaps best known as inclusions within other gems, rutile crystals themselves can be faceted or cabbed as curiosities for...
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Xonotlite Value, Price, and Jewelry Information

Xonotlite Value, Price, and Jewelry Information

Xonotlite is strong and can take a good polish. However, these gems are extremely rare, both as a species and...
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Jewelry Making Tools: An Introduction

Jewelry Making Tools: An Introduction

Jewelry making is a great way to tap into your creative side. Learn what jewelry making tools you’ll need to...
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Leucite Value, Price, and Jewelry Information

Leucite Value, Price, and Jewelry Information

Although abundant in various lava rocks, leucite is extremely rare in gem-quality form and often has a milky or cloudy...
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A World of Crystals

A World of Crystals

We live in a world of crystals. Learn what they are and where you can find them, from deep underground...
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Properly Charging Ceramic Laps

Properly Charging Ceramic Laps

A ceramic lap is an excellent choice for polishing gemstones. Here is a guide for properly charging ceramic laps and...
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Zektzerite Value, Price, and Jewelry Information

Zektzerite Value, Price, and Jewelry Information

Small, cuttable crystals of very rare zektzerite are found only in a mountainous location in Washington state. Faceted pieces would...
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Petalite Value, Price, and Jewelry Information

Petalite Value, Price, and Jewelry Information

Gem-quality, colorless, facetable petalite is rare and desirable to collectors. More so if the stones are large and free of...
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Tips for Polishing Synthetic Corundum

Tips for Polishing Synthetic Corundum

Polishing synthetic corundum without leaving pits requires certain techniques and tools. Get expert lapidary advice here.
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Rhodonite Value, Price, and Jewelry Information

Rhodonite Value, Price, and Jewelry Information

Ranging in color from pink to a fine rose red, rhodonite is a popular material for jewelry and decorative objects....
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Polishing Gemstones for Beginners: Pre-Polishing Advice

Polishing Gemstones for Beginners: Pre-Polishing Advice

Polishing gemstones is difficult to master. Pre-polishing plays a major role in how well a gem can take a polish....
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Top Spots for Gem Hunting in the US

Top Spots for Gem Hunting in the US

Visit one of the top gem hunting spots in the US. Go alone or with the family. A gemology-themed vacation...
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Apophyllite Value, Price, and Jewelry Information

Apophyllite Value, Price, and Jewelry Information

Although not suitable for jewelry, apophyllite is a popular collector's piece. Perhaps the whitest of all gems, some cut specimens...
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Gem Formation: How are Gemstones Created?

Gem Formation: How are Gemstones Created?

Gem formation usually involves mineral crystallization and other geological processes. Learn how these affect the gemstone properties gemologists study.
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Cuprite Value, Price, and Jewelry Information

Cuprite Value, Price, and Jewelry Information

One of the rarest of all facetable gems, cut cuprites can show magnificent deep red color. However, these beautiful stones...
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Gemstone Optical Properties

Gemstone Optical Properties

Learn how gemstone optical properties, like refractive index and pleochroism, help gemologists identify gems and lapidaries choose cuts.
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Sapphire Buying Guide

Sapphire Buying Guide

Long associated with royalty, sapphires are some of the most popular (and expensive) gems in the world. Our sapphire buying...
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Anhydrite (Angelite) Value, Price, and Jewelry Information

Anhydrite (Angelite) Value, Price, and Jewelry Information

Rare and difficult to cut, anhydrite is seldom faceted. However, this material can be carved into beautiful objects. “Angelite,” a...
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Parisite Value, Price, and Jewelry Information

Parisite Value, Price, and Jewelry Information

More well-known as rare inclusions in emeralds, parisite crystals are usually small and seldom faceted.
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Spinel Buying Guide

Spinel Buying Guide

Our spinel buying guide can help you learn how spinels are graded and how to identify a high-quality stone or...
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The Foundation Stones of the New Testament

The Foundation Stones of the New Testament

Commentaries on the foundation stones of the Book of Revelation influenced the development of the Western birthstone system. Learn more...
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Is Golden Beryl a Good Gem Choice for Jewelry?

Is Golden Beryl a Good Gem Choice for Jewelry?

Golden beryl, also known as heliodor, can display rich colors and is an excellent gem choice for jewelry. Learn more...
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Diamond Rough and Equipment for the Occasional Diamond Cutter

Diamond Rough and Equipment for the Occasional Diamond Cutter

Finding good diamond rough and the right equipment can be challenging for a non-professional diamond cutter. Learn what to look...
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Report Card for the Best Engagement Ring Insurance in 2024

Report Card for the Best Engagement Ring Insurance in 2024

Independent report by International Gem Society on the Best Engagement Ring Insurance on the Market in 2022.
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Euclase Value, Price, and Jewelry Information

Euclase Value, Price, and Jewelry Information

Although hard enough to be worn safely in jewelry, euclase in beautiful colors is rare over a few carats. It’s...
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Gemstone Wholesale Prices and the Art of Appraising

Gemstone Wholesale Prices and the Art of Appraising

There are few guides to gemstone wholesale prices. However, appraising gemstones requires in-depth knowledge and experience, not just price lists....
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Choosing the Best Colored Gemstones for Engagement Rings

Choosing the Best Colored Gemstones for Engagement Rings

Looking for alternatives to a classic diamond engagement ring? Learn about your options and see some wonderful photos of colored...
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Jewelry Nomenclature: Jewelry Attachments and Various Findings

Jewelry Nomenclature: Jewelry Attachments and Various Findings

Jewelry attachments are the pieces used to hold jewelry items together. Learn about the most popular types as well as...
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Garnet Symbolism

Garnet Symbolism

Garnet symbolism is rich and varied. The January birthstone has inspired many legends and popular associations with love, friendship, light,...
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Phenakite Value, Price, and Jewelry Information

Phenakite Value, Price, and Jewelry Information

Rare phenakite is a very hard gem material suitable for jewelry. Usually colorless, cut stones have little fire but can...
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Jewelry Nomenclature: Gem Earrings

Jewelry Nomenclature: Gem Earrings

Earrings are available in many styles. Learn to identify the most popular types of metal and gem earrings and the...
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What Were the Gemstones of the Breastplate of Aaron?

What Were the Gemstones of the Breastplate of Aaron?

In Exodus, the breastplate of Aaron was said to hold 12 gems. However, the gemological identities of the stones, like...
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Jewelry Nomenclature: Gem Bracelets and Necklaces

Jewelry Nomenclature: Gem Bracelets and Necklaces

Bracelets and necklaces share much of their terminology. Learn the names and functions of the different parts of these popular...
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Recommendations for Polishing Silver Jewelry

Recommendations for Polishing Silver Jewelry

These cleaning tips will make polishing silver jewelry a little easier. Learn how to prevent tarnish and how to clean...
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Tugtupite Value, Price, and Jewelry Information

Tugtupite Value, Price, and Jewelry Information

Gem collectors prize tugtupite, the "Reindeer Stone," for its rich colors and intense reaction to ultraviolet light. Sporadically used in...
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Jewelry Nomenclature: Gem Rings

Jewelry Nomenclature: Gem Rings

Though rings may come in many styles, gem cutters will regularly encounter a few common types of gem rings. Learn...
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The Pocket Spectroscope: A Quick Guide for Gemologists

The Pocket Spectroscope: A Quick Guide for Gemologists

An inexpensive pocket spectroscope can be great for student gemologists as well as pros who need to identify gems while...
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Serandite Value, Price, and Jewelry Information

Serandite Value, Price, and Jewelry Information

To date, only one locality — Mont St. Hilaire, Quebec, Canada — has produced facetable serandite. These extremely rare gems...
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Cutting Star Gemstones: Tips for Beginners

Cutting Star Gemstones: Tips for Beginners

Want to start cutting beautiful star gemstones? Here are some helpful gemological resources for novice lapidaries and jewelers.
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How to Buy a Diamond Online (Tips and Tricks)

How to Buy a Diamond Online (Tips and Tricks)

If you want to buy a diamond online rather than at a brick-and-mortar store, you’ll need to be well-informed about...
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Humite Value, Price, and Jewelry Information

Humite Value, Price, and Jewelry Information

Clinohumites and chondrodites can make beautiful gemstones with rich colors, but these members of the humite mineral group are rare...
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Do Emeralds and Peridots Look Good Together?

Do Emeralds and Peridots Look Good Together?

Although emeralds and peridots are both green gems, differences in shade might make it hard to pair them in jewelry....
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How to Grade Fancy Cut Diamonds

How to Grade Fancy Cut Diamonds

Fancy cut diamonds can have any finished shape, except round. These stones have their own grading criteria, in particular regarding...
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Weloganite Value, Price, and Jewelry Information

Weloganite Value, Price, and Jewelry Information

Truly a collector’s gem, weloganite is very rare and seldom cut. This stone can show pale yellow colors.
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How to Orient Sapphires with Silk Inclusions

How to Orient Sapphires with Silk Inclusions

Silk inclusions in sapphires are hard to detect. Learn to pick the best orientation and cut for these gems. You...
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Colemanite Value, Price, and Jewelry Information

Colemanite Value, Price, and Jewelry Information

Colemanite is an abundant mineral, and transparent material isn’t rare. However, gem cutters rarely facet these typically pale stones. Difficult...
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2021 Black Friday & Cyber Monday Deals on Diamond Rings

2021 Black Friday & Cyber Monday Deals on Diamond Rings

Online diamond sellers have occasional sales throughout the year but it's time-consuming to keep track of them all. One thing...
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Facts About Diamonds vs Diamond Buying Myths

Facts About Diamonds vs Diamond Buying Myths

You’re sure to encounter many myths when diamond buying. Learn these facts about diamonds so that you can find the...
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Dolomite Value, Price, and Jewelry Information

Dolomite Value, Price, and Jewelry Information

Although transparent dolomite crystals are fairly abundant and popular collector’s items, faceted gems are soft, fragile, and rarely seen in...
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How Much Should You Spend on a Diamond Engagement Ring?

How Much Should You Spend on a Diamond Engagement Ring?

The old rule about spending a month's salary on a diamond engagement ring is just that: old. Learn how you...
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How to Dry Opals Safely

How to Dry Opals Safely

Opals should be handled with care. If you buy opals that have been kept in water, follow these instructions to...
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Cryolite Value, Price, and Jewelry Information

Cryolite Value, Price, and Jewelry Information

Typically colorless with a “sleepy” look, cryolite is rarely found in nature. Rough suitable for gem faceting is extremely scarce....
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Cobaltite Value, Price, and Jewelry Information

Cobaltite Value, Price, and Jewelry Information

Cobaltite cabochons can have a lovely metallic luster. However, this gem material is very seldom faceted.
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How Can a Gemstone’s Optic Sign Change?

How Can a Gemstone’s Optic Sign Change?

A gemstone's optic sign may be listed as either + or -. Learn whether impurities in a specific stone or...
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Buying a Heart-Cut Diamond (Tips and Tricks)

Buying a Heart-Cut Diamond (Tips and Tricks)

This solitaire ring displays the distinctive heart-shaped stone perfectly. This romantic diamond shape is also ideal for a 14K rose...
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Chambersite Value, Price, and Jewelry Information

Chambersite Value, Price, and Jewelry Information

Chambersite is an exceedingly rare mineral. Although it has properties suitable for jewelry use, its crystals occur in very small...
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Opal Wearability and Jewelry Tips

Opal Wearability and Jewelry Tips

Are opals too delicate for jewelry? Learn how to choose the right settings for opal wearability, so you can enjoy...
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Barite Value, Price, and Jewelry Information

Barite Value, Price, and Jewelry Information

Massive white barite (also called known as baryte) looks like marble and could be used for decorative purposes. In spite...
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Anorthite Value, Price, and Jewelry Information

Anorthite Value, Price, and Jewelry Information

The rarest plagioclase feldspar, anorthite is very rarely faceted.
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Lapidary Tips for Polishing Girdles

Lapidary Tips for Polishing Girdles

What are the best techniques and tools for polishing girdles? Learn how to complete your faceted gems quickly and easily...
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Two-Carat Diamond Rings: Buying Top Quality

Two-Carat Diamond Rings: Buying Top Quality

Searching for a 2 carat diamond ring that is a real piece of eye candy?  Shopping for this diamond size...
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Datolite Value, Price, and Jewelry Information

Datolite Value, Price, and Jewelry Information

Polished and sliced datolite nodules can show off very attractive colors. Datolite is a popular collector’s mineral, but faceted and...
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What Does the GIA Colored Gem Grading Code Mean?

What Does the GIA Colored Gem Grading Code Mean?

The GIA grading system describes gem color in terms of hue, tone, and saturation. Learn what the abbreviations and numbers...
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Rhodochrosite Value, Price, and Jewelry Information

Rhodochrosite Value, Price, and Jewelry Information

Beautiful rose red to pink rhodochrosite crystals are popular with mineral collectors. Although very soft, opaque stones have been fashioned...
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The Best Radiant Diamond Engagement Rings for Every Budget

The Best Radiant Diamond Engagement Rings for Every Budget

Radiant diamonds combine symmetry, fire, and brilliance to offer, in one stone, the best traits of round and princess cut...
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Descriptive Crystallography for Gemologists

Descriptive Crystallography for Gemologists

Crystallography is the study of crystalline solids. Learn the most common terms gemologists use to describe the structure of crystal...
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Scorodite Value, Price, and Jewelry Information

Scorodite Value, Price, and Jewelry Information

With lovely colors and intense pleochroism, faceted scorodite is a prize for collectors of the rare and unusual. However, it’s...
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Anglesite Value, Price, and Jewelry Information

Anglesite Value, Price, and Jewelry Information

Although anglesites with pale colors can show great dispersion and brightness, they’re difficult to cut and inadvisable to wear. Faceted...
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How to Choose a Metal for Your Engagement Ring

How to Choose a Metal for Your Engagement Ring

Platinum and gold are the two most popular and most expensive metals for engagement rings. But are they the best...
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Kyanite Value, Price, and Jewelry Information

Kyanite Value, Price, and Jewelry Information

Kyanite’s physical properties make it very difficult to facet. However, it’s a popular collector’s gem, especially in sapphire-blue colors.
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Amazonite Value, Price, and Jewelry Information

Amazonite Value, Price, and Jewelry Information

A green to blue-green variety of microcline, amazonite makes a wonderful gemstone for cabbing and carving.
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How to Modify a Powder Scale for Specific Gravity Testing

How to Modify a Powder Scale for Specific Gravity Testing

Learn how to modify a powder scale for specific gravity testing. A handmade wire basket will make this easy-to-use scale...
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Siderite Value, Price, and Jewelry Information

Siderite Value, Price, and Jewelry Information

Siderite is difficult to cut, but this light brown collector's gem has yielded faceted pieces of great beauty.
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Guide to Organizing Your Gemstone Collection

Guide to Organizing Your Gemstone Collection

Learn how to organize your gemstone collection. Choose the storage and display options that are right for you and create...
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Serpentine Value, Price, and Jewelry Information

Serpentine Value, Price, and Jewelry Information

The gem material known as serpentine actually encompasses several related mineral species. For millennia, people have cut serpentines into beautiful...
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Anatase Value, Price, and Jewelry Information

Anatase Value, Price, and Jewelry Information

Anatase occurs in many beautiful colors, such as deep indigo and amber yellow. However, these rare gems are seldom transparent...
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Purpurite Value, Price, and Jewelry Information

Purpurite Value, Price, and Jewelry Information

Purpurite is too soft for jewelry wear and never transparent. Nevertheless, lapidaries have cut cabochons from this material with magnificent...
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Best Rough Gemstones for Beginning Faceting

Best Rough Gemstones for Beginning Faceting

Learn which rough gemstones are ideal for beginning faceting practice. A progression of relatively inexpensive gem species can teach important...
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Why Choose a Barion Cut?

Why Choose a Barion Cut?

Gem faceters must consider factors like brilliance, color, and faceting yield before choosing a cut style. Learn what a Barion...
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Creedite Value, Price, and Jewelry Information

Creedite Value, Price, and Jewelry Information

Probably fewer than a dozen creedite gems have ever been faceted. This rare mineral is rarer still as a cuttable...
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The Ultimate Guide to the Best Jewelry Insurance Companies

The Ultimate Guide to the Best Jewelry Insurance Companies

Our jewelry insurance guide reviews the policies of the top eight companies. Learn what to look for so you can...
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Ludlamite Value, Price, and Jewelry Information

Ludlamite Value, Price, and Jewelry Information

Ludlamite has a lovely green color, but cut stones are extremely rare. Large crystals of this phosphate mineral are known...
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Jade Symbolism

Jade Symbolism

Both jadeite and nephrite have inspired beautiful works of art and a rich body of lore. Jade symbolism covers themes...
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Standard Gem Sizes Chart

Standard Gem Sizes Chart

Will your gem fit in a standard setting? Use this chart of standard gem sizes for popular cuts and also...
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Prosopite Value, Price, and Jewelry Information

Prosopite Value, Price, and Jewelry Information

Prosopite is usually a nondescript mineral with no gem significance. However, beautiful blue specimens are sometimes cut for jewelry.
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Hematite Value, Price, and Jewelry Information

Hematite Value, Price, and Jewelry Information

Hematite has a long history of use as a pigment. As a gemstone, this material is often carved but very...
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Wavellite Value, Price, and Jewelry Information

Wavellite Value, Price, and Jewelry Information

Wavellite is a very attractive mineral, well-known to collectors. Its radial aggregate crystal clusters can be cut into extremely interesting...
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Stibiotantalite Value, Price, and Jewelry Information

Stibiotantalite Value, Price, and Jewelry Information

Rare stibiotantalite possesses an interesting mix of physical and optical properties that help distinguish it from other earth-toned gemstones. However,...
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Active Promo Codes for Diamond Rings and Jewelry

Active Promo Codes for Diamond Rings and Jewelry

Updated July 23, 2022. Up-to-date promo codes, coupons, and sales to save you money on diamond rings, engagement rings, jewelry,...
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Appraising Opals

Appraising Opals

Opals are unique gems with their own unique terminology. Learn the modern standard system for classifying and appraising opals used...
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Sodalite Value, Price, and Jewelry Information

Sodalite Value, Price, and Jewelry Information

Typically blue, durable, and easy to cut, sodalite is highly desired by hobbyists. Even stones that lack transparency make lovely...
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What is a Gem?

What is a Gem?

Even the most general definition of a gem has many exceptions. Learn what qualities have been used to identify gemstones...
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Mellite Value, Price, and Jewelry Information

Mellite Value, Price, and Jewelry Information

Mellite is a rare and unusual organic gemstone. Although soft and fragile, the “honey stone” is quite beautiful when cut....
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Should I Make an Investment in Bargain Rubies?

Should I Make an Investment in Bargain Rubies?

Do you have an offer for bargain rubies that's too good to be true? Learn what you need to know...
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Gemstones with Health Benefits

Gemstones with Health Benefits

Since ancient times, people have believed gems could have healing properties. Let’s take a look at some popular gemstones with...
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Fluorite Value, Price, and Jewelry Information

Fluorite Value, Price, and Jewelry Information

Although too fragile for most jewelry use, fluorites are often faceted for collectors. They occur in a wide range of...
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Grandidierite Value, Price, and Jewelry Information

Grandidierite Value, Price, and Jewelry Information

A rather rare mineral, lovely blue-green grandidierite is seldom seen in gem or jewelry collections. Translucent material is sometimes cut...
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Can Wearing Gems That Touch Your Skin Improve Your Health?

Can Wearing Gems That Touch Your Skin Improve Your Health?

Will wearing gems that touch the skin of your finger bring you health benefits? Before you buy any ring stone,...
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The Best Asscher Cut Diamond Engagement Rings For Every Budget

The Best Asscher Cut Diamond Engagement Rings For Every Budget

Asscher diamonds get their name from the Royal Asscher Diamond Company, the Dutch company that invented the cut. It features...
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The Best Round Engagement Rings For Every Budget

The Best Round Engagement Rings For Every Budget

Round cut diamonds have been around for centuries. As a timeless diamond cut, they offer exceptional resilience in popularity when...
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The Best Cushion-Cut Engagement Rings For Every Budget

The Best Cushion-Cut Engagement Rings For Every Budget

Cushion-cut diamonds are the second most sought-after diamonds on the market today. The cut's popularity comes from combining two other...
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Gem and Jewelry Insurance Quotes: Four Money-Saving Questions

Gem and Jewelry Insurance Quotes: Four Money-Saving Questions

How can you get lower gem and jewelry insurance quotes? Asking a potential insurer these four questions could help lower...
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Is Lab-Created Alexandrite Real Alexandrite?

Is Lab-Created Alexandrite Real Alexandrite?

Natural alexandrite is popular and rare, which creates a market for synthetics. But is lab-created alexandrite real alexandrite? Learn the...
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Jewelry and Gemstone Insurance: Nine Questions You Need to Ask

Jewelry and Gemstone Insurance: Nine Questions You Need to Ask

Before you buy jewelry and gemstone insurance, learn what to ask insurance companies and make sure the policy meets your...
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Bloodstone Value, Price, and Jewelry Information

Bloodstone Value, Price, and Jewelry Information

Also known as heliotrope, bloodstone is the traditional March birthstone. This dark green, opaque chalcedony with red to orange spots...
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Does Homeowners Insurance Cover Gems and Jewelry?

Does Homeowners Insurance Cover Gems and Jewelry?

Your homeowners insurance may cover gems and jewelry, but don’t assume it covers all risks or the value of your...
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Is Uranium Glass Safe to Facet?

Is Uranium Glass Safe to Facet?

Uranium glass, or Vaseline glass, is a prized collector's item and is generally safe to handle. But is it safe...
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The Best Oval Diamond Engagement Rings for Every Budget

The Best Oval Diamond Engagement Rings for Every Budget

Oval diamonds are consistently one of the most popular diamond cuts on the market. Oval diamond engagement rings are popular...
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Kämmererite Value, Price, and Jewelry Information

Kämmererite Value, Price, and Jewelry Information

A beautiful but rare mineral, kämmererite is extraordinarily difficult to facet. As a result, the availability of cut gems is...
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Jewelry and Gemstone Appraisals for Insurance

Jewelry and Gemstone Appraisals for Insurance

Need insurance for your jewelry? You’ll need jewelry and gemstone appraisals. Learn what info they should include and who to...
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Diamond Cutting for Hobbyists: Getting Started

Diamond Cutting for Hobbyists: Getting Started

With study, care, and the right tools, hobbyist gem cutters can add diamond cutting to their repertoire. Get started with...
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Jet Value, Price, and Jewelry Information

Jet Value, Price, and Jewelry Information

Historically a popular black gem, jet has declined in popularity in modern times. Although jet jewelry has been long associated...
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Are There Any Fair Gemstone Pricing Formulas?

Are There Any Fair Gemstone Pricing Formulas?

Can gemstone pricing formulas help gem merchants and buyers make fair deals? Learn what factors should play a role in...
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What’s the Difference Between Mineral Samples and Gem Rough?

What’s the Difference Between Mineral Samples and Gem Rough?

For faceting, the distinction between gems and minerals is usually clarity. However, learn why the decision to cut may be...
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Aquamarine Grading and Pricing

Aquamarine Grading and Pricing

Aquamarines are evaluated based on the Four Cs: color, clarity, cut, and carat. Learn how each factor affects aquamarine grading...
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Learn How to Use the IGS Gem Price Guide

The IGS Gem Price Guide covers commonly traded colored gemstones as well as more unusual, collectible gems. The values listed...
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Spurrite Value, Price, and Jewelry Information

Spurrite Value, Price, and Jewelry Information

An attractive but uncommon mineral, spurrite has seldom been cut as a gemstone. However, it has the hardness and tenacity...
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Kurnakovite Value, Price, and Jewelry Information

Kurnakovite Value, Price, and Jewelry Information

Kurnakovite is difficult to cut, inadvisable to wear, and usually colorless. Consequently, faceted specimens are extremely rare.
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Rhodizite Value, Price, and Jewelry Information

Rhodizite Value, Price, and Jewelry Information

Rhodizite is tough enough to make an excellent jewelry stone. However, it's quite a rare mineral. Faceted specimens are extremely...
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What is Gemstone Dispersion?

What is Gemstone Dispersion?

Learn what gemstone dispersion means, what causes it, and how it relates to other optical effects.
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A Tribute to Bench Jewelers

A Tribute to Bench Jewelers

Bench jewelers work very hard with little or no acknowledgement, creating and repairing treasured possessions. These stories pay tribute to...
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Epidote Value, Price, and Jewelry Information

Epidote Value, Price, and Jewelry Information

The epidote mineral supergroup contains many related species of interest to collectors. However, epidote itself is the one most likely...
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Creating Ring Mountings for Deep-Cut Gemstones

Creating Ring Mountings for Deep-Cut Gemstones

Deep-cut gems like Barions may not fit in standard ring mountings. Jewelers can try to find special mounts or custom...
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Obsidian Value, Price, and Jewelry Information

Obsidian Value, Price, and Jewelry Information

Obsidian is the most common form of natural glass and occurs in many attractive varieties. Since prehistoric times, people have...
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Phenomenal Gems: Cat’s Eyes, Star Stones, and More

Phenomenal Gems: Cat’s Eyes, Star Stones, and More

Phenomenal gems seem to do magical things with light. Learn the science behind optical effects like cat’s eyes and star...
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Pollucite Value, Price, and Jewelry Information

Pollucite Value, Price, and Jewelry Information

Colorless pollucites lack fire when cut and are usually small. However, this very rare cesium mineral is a coveted collector's...
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Aquamarine Enhancements

Aquamarine Enhancements

The most common aquamarine enhancements try to turn blueish green stones pure blue. Learn how heating and other aquamarine treatments...
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Aquamarine Durability

Aquamarine Durability

Aquamarines are fairly tough jewelry stones, but they do have some weaknesses. Learn about aquamarine durability and what precautions you...
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Synthetic Aquamarines

Synthetic Aquamarines

Synthetic aquamarines are relatively rare, but gemologists may encounter them. Learn how these stones are made and how to distinguish...
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Aquamarine Setting Advice

Aquamarine Setting Advice

Aquamarines can look great, but what’s the best way to mount them? Novice jewelers should learn the pros and cons...
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Distinguishing Aquamarine Imitations

Distinguishing Aquamarine Imitations

How can gemologists quickly distinguish aquamarines from aquamarine imitations? We’ll review some common lookalikes and their most notable differences.
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Phosgenite Value, Price, and Jewelry Information

Phosgenite Value, Price, and Jewelry Information

Rare phosgenite typically shows pale colors. This material is difficult to cut and too soft for jewelry wear. However, its...
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Aquamarine Sources

Aquamarine Sources

Aquamarines are popular gemstones and can be found in many areas worldwide. Learn about some prized varieties and the most...
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Cerussite Value, Price, and Jewelry Information

Cerussite Value, Price, and Jewelry Information

As beautiful as a diamond, a faceted cerussite actually has higher dispersion and usually excellent transparency, colorless or light body...
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How Do Aquamarines Form?

How Do Aquamarines Form?

The March birthstone, aquamarine is a popular gem. Learn how aquamarines form, what they look like, and how they get...
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Milarite Value, Price, and Jewelry Information

Milarite Value, Price, and Jewelry Information

Very rare milarite crystals can occur in green and yellow colors. Transparent material can yield small but pleasant looking faceted...
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Six Famous Aquamarines

Six Famous Aquamarines

Aquamarines have been cut into many large and beautiful gemstones. Let’s take a look at six of the world’s most...
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Magnesite Value, Price, and Jewelry Information

Magnesite Value, Price, and Jewelry Information

Transparent, gem-quality magnesite is rare and beautiful, with colors ranging from colorless, white, and gray to a yellowish brown.
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Amber Symbolism

Amber Symbolism

Amber has a long history of ornamental use and popular associations with animals, energy, and the Sun. Learn more about...
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Eosphorite Value, Price, and Jewelry Information

Eosphorite Value, Price, and Jewelry Information

Faceted eosphorites in pale colors are quite attractive and easy to cut. However, these very rare gems are too soft...
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Sapphirine Value, Price, and Jewelry Information

Sapphirine Value, Price, and Jewelry Information

Sapphirines are durable but very rare gemstones. Although named after their typically sapphire-blue color, these gems can occur in different...
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Does Refractive Index Affect Gemstone Brightness?

Does Refractive Index Affect Gemstone Brightness?

Many factors contribute to gemstone brightness. Learn the role a gem's refractive index plays and the difference between gemology theory...
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Lazulite Value, Price, and Jewelry Information

Lazulite Value, Price, and Jewelry Information

Lazulite makes a magnificent, deep blue gemstone. Although the mineral itself occurs widely, gem-quality rough is limited. Specimens are prized...
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Recommended Diamond Grading Tools for Novices

Recommended Diamond Grading Tools for Novices

Identifying diamonds requires the right equipment. Learn what diamond grading tools novice professionals or hobbyists need.
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Adamite Value, Price, and Jewelry Information

Adamite Value, Price, and Jewelry Information

Although adamite occurs in many localities, it's very rarely cut as a gem. This mineral is much too soft and...
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Staurolite Value, Price, and Jewelry Information

Staurolite Value, Price, and Jewelry Information

Staurolite crystals in opaque cross shapes are popular gemstones. However, this material is very rarely transparent or facetable. These dark...
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Amblygonite Value, Price, and Jewelry Information

Amblygonite Value, Price, and Jewelry Information

Amblygonite gems are usually pale straw yellow. Although they are too soft and cleavable to make good ring stones, collectors...
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Celestite Value, Price, and Jewelry Information

Celestite Value, Price, and Jewelry Information

Soft, fragile, and hard to cut, celestite or celestine is seldom seen in gem collections. These gems are usually colorless...
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Faceting Tips for Exotic Gemstones

Faceting Tips for Exotic Gemstones

Some gems are seldom faceted because they're rarely found in nature or rarely used for jewelry. Learn a few tricks...
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Rubellite Tourmaline Buying Guide

Rubellite Tourmaline Buying Guide

Our rubellite buying guide can help you learn how rubellites are graded, what to avoid, and how to identify a...
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Paraíba Tourmaline Value, Price, and Jewelry Information

Paraíba Tourmaline Value, Price, and Jewelry Information

Discovered in 1989, paraíba tourmalines are among the world’s most prized gemstones. These rare gems are renowned for showing intense...
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Chrome Tourmaline Buying Guide

Chrome Tourmaline Buying Guide

Rare chrome tourmaline can show an emerald-like green color. With a highly desired color and tourmaline's excellent qualities as a...
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Some Advice for Cutting Tourmaline Gemstones

Some Advice for Cutting Tourmaline Gemstones

Cutting tourmaline can be difficult. Some gems seem to shatter easily. Learn faceting techniques to minimize this risk as well...
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Verdelite (Green Tourmaline) Buying Guide

Verdelite (Green Tourmaline) Buying Guide

Looking for a tourmaline jewelry stone? If you like green and you're on a budget, green tourmaline or verdelite is...
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What is a Crystal?

What is a Crystal?

Learn the scientific definition of crystal used by gemologists and answer some basic questions about what is and is not...
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What is a Gem Reflectometer?

What is a Gem Reflectometer?

What’s the difference between a reflectometer and a refractometer? If you’re interested in studying or buying gems, learn the facts...
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What is the Usambara Effect In Gemstones?

What is the Usambara Effect In Gemstones?

The Usambara effect is a gemstone color change phenomenon distinct from pleochroism or the alexandrite effect. Tourmaline and other species...
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Are There Color Change Diamonds?

Are There Color Change Diamonds?

A classic chameleon diamond can change color from green to yellow under certain conditions. Learn more about this process and...
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Can Diamonds Burn?

Can Diamonds Burn?

Diamonds may form under intense heat and pressure, but under what conditions can diamonds burn? Learn the science behind a...
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What Causes Fuzzy Refractometer Readings?

What Causes Fuzzy Refractometer Readings?

Fuzzy refractometer readings may be the result of poorly faceted gems, the wrong amount of refraction liquid, and even stone...
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How to Estimate Gem Weight in a Jewelry Setting

How to Estimate Gem Weight in a Jewelry Setting

Although you can't weigh a gemstone in a jewelry setting, you can get a close approximation of the gem weight...
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What are Gemstone Absorption Spectra?

What are Gemstone Absorption Spectra?

Learn how gems absorb wavelengths of light and how gemologists use gemstone absorption spectra to identify gems. There’s more to...
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How to Re-Polish a Refractometer Hemicylinder

How to Re-Polish a Refractometer Hemicylinder

The glass used to make refractometer hemicylinders is susceptible to tarnish. Here's a step-by-step guide for re-polishing a refractometer hemicylinder....
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One Carat Oval Diamonds: A Complete Shopping Guide

One Carat Oval Diamonds: A Complete Shopping Guide

One-carat oval diamonds are versatile alternatives to one-carat rounds. Our guide can help you find the right oval-cut diamond for...
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Spectroscope Instructions for Novice Gemologists

Spectroscope Instructions for Novice Gemologists

The spectroscope is one of gemology’s principal tools. Our basic spectroscope instructions will teach you how to operate and calibrate...
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Specific Gravity Testing Part 5: Using Heavy Liquids

Specific Gravity Testing Part 5: Using Heavy Liquids

Using heavy liquids to measure a gemstone's specific gravity poses some health hazards. Learn the techniques and precautions that gemologists...
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Specific Gravity Testing Part 3: Calculating Specific Gravity with an Electronic Scale

Specific Gravity Testing Part 3: Calculating Specific Gravity with an Electronic Scale

You can use an electronic scale for calculating specific gravity if you have the right accessory, a hanging basket for...
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Specific Gravity Testing Part 2: Using a Balance Scale or a Hanneman Specific Gravity Scale

Specific Gravity Testing Part 2: Using a Balance Scale or a Hanneman Specific Gravity Scale

Using a balance scale to test specific gravity is a recommended practice in gemology. Learn to make your own scale...
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Gemstone Physical Properties

Gemstone Physical Properties

The optical properties of gems attract our eyes and can give a cut stone a unique character. However, gemstone physical...
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Specific Gravity Testing Part 1: Definitions

Specific Gravity Testing Part 1: Definitions

Learn specific gravity testing methods for gem identification. Our 5-part introductory series starts with the basics and key definitions.
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Corundum Treatments

Corundum Treatments

Corundum gems receive more types of treatments than any other stones. Learn how to test rubies and sapphires for signs...
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Color Change Garnet Value, Price, and Jewelry Information

Color Change Garnet Value, Price, and Jewelry Information

Any stone that changes color under different types of light is a rare treat for collectors. Color change garnets show...
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Gemstone Treatment Codes

Gemstone Treatment Codes

The AGTA has proposed the use of gemstone treatment codes to promote disclosure and a common language for these procedures....
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How Does Vapor Deposition Create Mystic Topaz and Aqua Aura Quartz?

How Does Vapor Deposition Create Mystic Topaz and Aqua Aura Quartz?

Vapor deposition can be used to enhance gemstones like topaz and quartz with a metal coating or sheen. Learn how...
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Topaz Buying Guide

Topaz Buying Guide

Our topaz buying guide can help you learn how topazes are graded, what to avoid, and how to identify a...
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Pyrope Garnet Value, Price, and Jewelry Information

Pyrope Garnet Value, Price, and Jewelry Information

Pyrope always occurs in series with other garnet species. Common, dark red garnets are a mixture of almandine and pyrope....
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What are Gemstone Enhancements?

What are Gemstone Enhancements?

Gemstone enhancements improve the appearance and wearability of gems. Learn about the most commonly used procedures and frequently treated types...
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Refractive Index List of Common Household Liquids

Refractive Index List of Common Household Liquids

Gemologists may immerse gems in refraction fluids during examinations. This refractive index list of household liquids offers some common alternatives....
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Tucson Gem and Mineral Show Reviews

Tucson Gem and Mineral Show Reviews

Novice and expert gemologists discuss their experiences at the celebrated annual February Tucson Gem and Mineral Show. You'll find reviews...
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How to Clean Your Gemstone Jewelry

How to Clean Your Gemstone Jewelry

A little gemology goes a long way. Learn how to clean your gemstone jewelry safely and how to deal with...
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Pricing Faceted Gems and Calculating Your Return

Pricing Faceted Gems and Calculating Your Return

Properly pricing faceted gems can be a daunting task for investors. Learn how to research gem prices and calculate your...
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Malachite Symbolism

Malachite Symbolism

Behind every mystical gem is a merchant. Since ancient times, malachite has been “the salesman's stone.” Learn more about malachite...
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Marketing Your Gems Online

Marketing Your Gems Online

Accurate descriptions and quality photographs are essential for marketing your gems online. Learn about options and best practices for improving...
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A Guide to Gem Selling Platforms

A Guide to Gem Selling Platforms

Determining where to sell your gems — whether online or in-person — can be difficult. Here’s a look at the...
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Lapis Lazuli Symbolism

Lapis Lazuli Symbolism

How do you say “love me” with a stone? Learn about lapis lazuli symbolism and legends. This beautiful blue mineral...
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Negotiating Strategies for the Gem Trade

Negotiating Strategies for the Gem Trade

What negotiating strategies work best in the gem trade? Learn how some general principles and a win-win mindset can help...
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How to Prepare for Gemstone Negotiations

How to Prepare for Gemstone Negotiations

Research is crucial for success in any business deal. To prepare for gemstone negotiations, focus on these three subjects to...
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Turquoise Symbolism

Turquoise Symbolism

Many people consider beautiful sky blue turquoise stones to be lucky. Learn about the turquoise symbolism and lore of Native...
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Negotiations 101: Key Principles for Buying Gems for Profit

Negotiations 101: Key Principles for Buying Gems for Profit

Your gem investment profits depend mostly on the prices you set through negotiations. Understanding four key business principles will help...
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Options for Financing Gem Buying for Profit

Options for Financing Gem Buying for Profit

How should you pay for investment gems? Learn the pros of cons of three options for financing gem investments —...
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How to Establish a Network of Gem Trade Contacts

How to Establish a Network of Gem Trade Contacts

To make a profit investing in gems, you’ll need a network of gem trade contacts. Here’s some advice on how...
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Gemstone Sourcing Guide

Gemstone Sourcing Guide

Investors have many gemstone sourcing options, but which ones will work best for you? Learn the pros and cons, as...
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The Impact of Lab-Grown Stones on the Gem Market

The Impact of Lab-Grown Stones on the Gem Market

Lab-grown stones have the potential to disrupt the gem market. Learn how they can affect supply and demand and whether...
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Topaz Symbolism

Topaz Symbolism

Topaz's most popular mystical association has been with wealth. However, topaz symbolism and lore also covers areas such as health,...
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Insights on Gemstone Pricing

Insights on Gemstone Pricing

Gemstone pricing can vary greatly between dealers. Learn about the myriad factors that go into prices for both colored gems...
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Gemstone Orientation for Beginners

Gemstone Orientation for Beginners

Choosing the best gemstone orientation for your rough takes skill and experience. Learn what factors you should take into account...
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Gemstone Rarity and Ease of Replacement

Gemstone Rarity and Ease of Replacement

Most gemstones are rare, but some are rarer than others. Learn how gemstone rarity and ease of replacement can affect...
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Inclusion Management and Gemstone Faceting

Inclusion Management and Gemstone Faceting

Inclusion management is one of the most challenging aspects of gemstone faceting. Learn when to remove and when to keep...
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Supply and Demand: Gemstone Market Dynamics

Supply and Demand: Gemstone Market Dynamics

The gem market can be very subjective. Nevertheless, investors can make money by starting with the basics: understanding supply and...
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What Do the GIA Gem Clarity Grading Codes Mean?

What Do the GIA Gem Clarity Grading Codes Mean?

A gemstone’s clarity grade indicates how free it is of inclusions and blemishes. Learn how to decipher the GIA clarity...
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Gemstone Buying for Profit: Budget and Basis

Gemstone Buying for Profit: Budget and Basis

Good-quality gemstones are expensive, but you can make money investing in gems even if you have a small investment budget....
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Managing Your Time Horizon for Gem Buying and Selling

Managing Your Time Horizon for Gem Buying and Selling

How long should investors hold on to gemstones? Learn how your investment goals, business model, and patience affect your investment...
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Evaluating Market Risk for Gemstones

Evaluating Market Risk for Gemstones

Gemstone investors must keep up with global trends when evaluating market risk. Learn how studying sociocultural factors can lead to...
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Risk Management and Gem Buying for Profit

Risk Management and Gem Buying for Profit

You can’t eliminate all risks from gem investing, but understanding the risks you’ll face and your appetite for them will...
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Buying Gems for Profit: An Introduction

Buying Gems for Profit: An Introduction

Successful investing in gemstones requires knowledge and experience. The IGS Buying Gems for Profit course will give you the knowledge...
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Gem Pricing Advice for Faceters

Gem Pricing Advice for Faceters

Gem pricing isn't easy, and guidelines aren't always fixed. Learn what factors gem cutters should consider to determine a fair...
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What is Gemstone Pleochroism?

What is Gemstone Pleochroism?

Some gems show pleochroism, two or three different colors depending on the viewing angle. Learn why this occurs and how...
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How to Re-Oil Emeralds Safely and Easily

How to Re-Oil Emeralds Safely and Easily

Oil treatment is a standard industry practice for enhancing emeralds. However, the treatments are not permanent. Learn how to re-oil...
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Meteorite Jewelry: An Introduction

Meteorite Jewelry: An Introduction

Meteorites can make beautiful, unique jewelry. This primer on meteorite terminology will help you buy the perfect meteorite jewelry piece...
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What Causes Emerald Fractures?

What Causes Emerald Fractures?

Emeralds get their green color from chromium and vanadium. Learn how the presence of these elements affects their formation and...
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Emerald Fillers and Treatments

Emerald Fillers and Treatments

Emerald fillers can improve the beauty of these gems but also have some drawbacks. Learn how to choose the right...
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Ruby Buying Guide – Special Free Preview

Ruby Buying Guide – Special Free Preview

Our ruby buying guide can help you learn how rubies are graded, what to avoid, and how to identify a...
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