Donald Clark, CSM

Donald Clark, CSM IMG

Founder

The late Donald Clark, CSM founded the International Gem Society in 1998. Donald started in the gem and jewelry industry in 1976. He received his formal gemology training from the Gemological Institute of America (GIA) and the American Society of Gemcutters (ASG). The letters “CSM” after his name stood for Certified Supreme Master Gemcutter, a designation of Wykoff’s ASG which has often been referred to as the doctorate of gem cutting. The American Society of Gemcutters only had 54 people reach this level. Along with dozens of articles for leading trade magazines, Donald authored the book “Modern Faceting, the Easy Way.”

Articles by Donald Clark, CSM IMG

The Microscope: A Guide for Gemologists

The Microscope: A Guide for Gemologists

Sometimes, microscopic inclusions are the only way to distinguish natural from synthetic gems. This makes the microscope an essential lab...
Read More
Destructive Gemstone Tests: Acid Testing

Destructive Gemstone Tests: Acid Testing

Acid testing is a destructive procedure gemologists can use to determine if some pieces are real or fake. Learn how...
Read More
A Consumer's Guide to Gem Grading

A Consumer's Guide to Gem Grading

Learn how gemologists evaluate color, clarity, cut, and carat for gem grading. Consumers can use this information to find the...
Read More
Destructive Gemstone Testing

Destructive Gemstone Testing

Destructive gemstone testing, done carefully, can help gemologists with difficult gem identifications. Learn the right techniques with our 5-part series....
Read More
Disclosing Enhancements: A Gemologist's Guide

Disclosing Enhancements: A Gemologist's Guide

Disclosing enhancements to gems is a key duty for gemologists. Learn what are the hardest treatments to detect and how...
Read More
An Introduction to Gem Identification

An Introduction to Gem Identification

Gem identification is part detective work, part art. Learn how gemologists can distinguish gem species and determine whether a stone...
Read More
Grading Gem Carvings

Grading Gem Carvings

Gem carvings are judged on material, workmanship, and artistry. Learn how to apply these criteria to a piece with our...
Read More
Destructive Gemstone Tests: Hot Point Testing

Destructive Gemstone Tests: Hot Point Testing

Gemologists use the hot point test to determine if a piece is a plastic imitation or coated in wax. Learn...
Read More
10X Loupe for Gemologists and Jewelers

10X Loupe for Gemologists and Jewelers

The 10X loupe is the gemologist's best friend. Learn how to examine gemstones for fractures, inclusions, color, and much more...
Read More
Clarity Grading Diamonds

Clarity Grading Diamonds

Mastering clarity grading diamonds takes a lot of experience. This grading guide, with definitions, images, and examples, can help beginning...
Read More
Diamond Rating: A Beginner's Guide

Diamond Rating: A Beginner's Guide

First-time buyers may not understand how diamond rating works. Our guide will teach you how diamonds are graded, so you...
Read More
Diamond Lookalikes Listed by Specific Gravity

Diamond Lookalikes Listed by Specific Gravity

Distinguishing diamond lookalikes from the real thing can be challenging. Learn how to use specific gravity and birefringence to make...
Read More
Polariscope Guide, Part 3: Testing for Gemstone Twinning, Dichroism, and Crystal Strain

Polariscope Guide, Part 3: Testing for Gemstone Twinning, Dichroism, and Crystal Strain

You can use a polariscope to observe gemstone twinning, dichroism, and crystal strain. Test your ability to identify these and...
Read More
Polariscope Guide, Part 2: Testing for Optic Figure and Sign

Polariscope Guide, Part 2: Testing for Optic Figure and Sign

Learn how to use a polariscope to find the optic figure and sign of a gemstone. This is an important...
Read More
Polariscope Guide, Part 1: Testing Gemstone Refraction

Polariscope Guide, Part 1: Testing Gemstone Refraction

The polariscope is one of gemology’s simplest and most useful tools. With a little practice and our three-part polariscope guide,...
Read More
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...
Read More
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.
Read More
Gemstone Optical Properties

Gemstone Optical Properties

Learn how gemstone optical properties, like refractive index and pleochroism, help gemologists identify gems and lapidaries choose cuts.
Read More
Distinguishing Diamonds: Educating Your Eyes

Distinguishing Diamonds: Educating Your Eyes

Distinguishing diamonds from their lookalikes requires educated eyes. Learn what visual features to look for and the properties of many...
Read More
Refractometer Guide, Part 3: Determining Optic Character and Recognizing Optic Effects

Refractometer Guide, Part 3: Determining Optic Character and Recognizing Optic Effects

Learn how to determine a gem’s optic character with a refractometer and identify optical effects you may encounter during gem...
Read More
Refractometer Guide, Part 2: Cabochon Testing

Refractometer Guide, Part 2: Cabochon Testing

Sometimes, analyzing cabochon gems with a refractometer requires different techniques than those for faceted gems. Learn these cabochon testing methods....
Read More
Refractometer Guide, Part 1: Refractive Index Testing

Refractometer Guide, Part 1: Refractive Index Testing

A gem refractometer is the best tool for refractive index testing. Learn how to use this instrument to conduct this...
Read More
Choosing the Right Cut: A Faceter's Guide

Choosing the Right Cut: A Faceter's Guide

Choosing the right cut for a piece of gem rough is an art. Learn how to balance brilliance with color...
Read More
What are Crystal Systems and Mineral Habits?

What are Crystal Systems and Mineral Habits?

Crystals have habits. In crystallography, mineral habits refer to the way crystals form within a specific mineral. There are six...
Read More
Gemstone Hardness and Wearability

Gemstone Hardness and Wearability

Gemstone hardness measures resistance to scratching. A gem's wearability grade takes hardness into account, but it’s only one of many...
Read More
Modern Diamond Cut Grading Methods

Modern Diamond Cut Grading Methods

The GIA modern diamond cut grading method is the most widely accepted in the industry. Our step-by-step guide covers the...
Read More
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...
Read More
Jewelry Nomenclature: Gem Settings

Jewelry Nomenclature: Gem Settings

Jewelry designers and consumers can pick from many different gem settings. Learn the names and uses of common and speciality...
Read More
Traditional Diamond Cut Grading Methods

Traditional Diamond Cut Grading Methods

Traditional diamond cut grading methods prepare gemologists for making evaluations with minimal time, tools, and references. This step-by-step guide covers...
Read More
Opal Buying Guide

Opal Buying Guide

Our opal buying guide can help you learn how opals are graded, what to avoid, and how to identify a...
Read More
Simple Design Ideas for Freeform Gems

Simple Design Ideas for Freeform Gems

You can learn gem carving by practicing simple designs. Let the native shapes of stones inspire freeform gems you can...
Read More
Prong Setting Gems: A Beginner's Guide

Prong Setting Gems: A Beginner's Guide

Using prongs is the most common way to secure a gem to a jewelry piece. Learn basic prong setting procedures...
Read More
Australian Opals

Australian Opals

Australian opals account for 95% of the world’s supply. Learn about Australia’s geological history, the start of its opal trade,...
Read More
Clarity Grading for Colored Gemstones

Clarity Grading for Colored Gemstones

Don't underestimate the importance of clarity, one of the Four Cs of gemstone grading. For faceted gems, basic clarity grading...
Read More
Gemstone Polishing Laps and Techniques

Gemstone Polishing Laps and Techniques

No single gemstone polishing method will work for all people or all stones. Our guide will help you choose laps...
Read More
Tips for Cutting Kunzite

Tips for Cutting Kunzite

Cutting kunzite and other gemstones with easy cleavage is challenging. These tips can help you facet this beautiful and valuable...
Read More
Writing Effective Advertising for Gems and Jewelry

Writing Effective Advertising for Gems and Jewelry

If you’re in the gem and jewelry business, you’ll need to write effective advertising. These techniques will help you succeed....
Read More
Cutting Star and Cat's Eye Gems

Cutting Star and Cat's Eye Gems

Learn how to cut star and cat's eye gems. Once you understand how asterism and chatoyancy work, you'll find unexpected...
Read More
Custom Gem Faceting Styles

Custom Gem Faceting Styles

Gem cutters can choose from many faceting styles. Learn about the most common custom cutting techniques and pick one that...
Read More
How to Correct Faceting Mistakes

How to Correct Faceting Mistakes

Faceting mistakes can cost gem cutters time and money. Learn some techniques for fixing common errors and making your repairs...
Read More
Recutting Diamonds and Colored Gemstones

Recutting Diamonds and Colored Gemstones

When is recutting diamonds and other gems worthwhile for a professional gemologist? Learn how to make this determination and avoid...
Read More
How to Grade Set Gemstones

How to Grade Set Gemstones

Gems in jewelry settings can't be evaluated the same way as loose stones. These guidelines are for gemologists learning to...
Read More
Take the Birthstone Quiz

Take the Birthstone Quiz

What do you know about birthstones? Take our short birthstone quiz and learn about the makeup, cutting, and value of...
Read More
Choosing the Right Jewelry Settings for Your Gems

Choosing the Right Jewelry Settings for Your Gems

How do you choose jewelry settings for your gems? Learn the pros and cons of pre-made settings, assembling findings, modifying...
Read More
Cabochon Carving Tools and Techniques

Cabochon Carving Tools and Techniques

Whether you're creating a simple gem accent or an exquisite cameo, the tools and techniques of cabochon carving are the...
Read More
Gemstone Dopping Techniques

Gemstone Dopping Techniques

A novice gem cutter needs to master various dopping techniques for cabbing and faceting gemstones. Learn how to attach gem...
Read More
Polishing Metals: An Introduction

Polishing Metals: An Introduction

Getting a brilliant polish is one of the most important steps to finishing fine jewelry. Learn the tools and techniques...
Read More
Soldering Precious Metals

Soldering Precious Metals

Soldering is one of the most useful techniques a metal smith can have. It is used both to create new...
Read More
Gemstone Color Change Phenomena

Gemstone Color Change Phenomena

Why do certain gems change color under different lights? Explore gemstone color change phenomena and the difference between natural and...
Read More
Appraising Opals

Appraising Opals

Opals are unique gems with their own unique terminology. Learn the modern standard system for classifying and appraising opals used...
Read More
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...
Read More
An Introduction to Gemstone Grading

An Introduction to Gemstone Grading

How goes gemstone grading work? Learn how gemologists evaluate both diamonds and colored gems and the qualities they examine.
Read More
Appraising Gems and Jewelry

Appraising Gems and Jewelry

Appraising gems and jewelry involves opinions of value based on knowledge and research. Learn what information gemologists should include on...
Read More
Tips and Tools for Handling Gems Securely

Tips and Tools for Handling Gems Securely

These tips and tools for handling gems securely will help novice gemologists and gem cutters reduce the risk of dropping...
Read More
Basic Jewelry and Gem Appraisal Terms: What is Value?

Basic Jewelry and Gem Appraisal Terms: What is Value?

Many people assume that a gem appraisal sets a definitive price for an item. Actually, the price depends on the...
Read More
A Guide to Gem Classification

A Guide to Gem Classification

Gemologists use several different gem classification methods. Learn how the most common systems work and what they cover as well...
Read More
Glass Value, Price, and Jewelry Information

Glass Value, Price, and Jewelry Information

Glass has been used in jewelry for thousands of years. By itself, glass is brittle and unimpressive with very little...
Read More
What are Allochromatic and Idiochromatic Gems?

What are Allochromatic and Idiochromatic Gems?

Learn the difference between allochromatic and idiochromatic gems and why some gem species can occur in many color varieties and...
Read More
Advice for Determining Gemstone Value

Advice for Determining Gemstone Value

Judging gemstone value is complex, and new gemologists can have trouble with this. These four exercises can help you learn...
Read More
Carats and Gemstone Grading

Carats and Gemstone Grading

Carats are the units used to measure gem weight and one of the main factors in gem grading. Learn what...
Read More
Money-Saving Ways to Clean Jewelry

Money-Saving Ways to Clean Jewelry

Some household products and do-it-yourself methods can clean jewelry safely and save you money. Discover the common ingredients in some...
Read More
Product Review: GL SpectroLite

Product Review: GL SpectroLite

The GL SpectroLite is an inexpensive and easy-to-use tool that can help gemologists conduct spectroscope exams. Read our review to...
Read More
Product Review: No Name Refractometers

Product Review: No Name Refractometers

Beware of cheap "no name” refractometers (and their distributors). These tools may not be suitable for gem identification. Read our...
Read More
Product Review: Duplex II and Rayner Dialdex Refractometers

Product Review: Duplex II and Rayner Dialdex Refractometers

The Duplex II and Rayner Dialdex both make excellent refractometers for gemologists. How do they compare head-to-head? Learn more from...
Read More
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...
Read More
What are Gem Species and Gem Varieties?

What are Gem Species and Gem Varieties?

Gem species are mineral species prized for their durability and beauty. Learn how chemical formulas and crystal structures define species...
Read More
Product Review, Gem Lab Refractometer

Product Review, Gem Lab Refractometer

A refractometer is an important tool for gem identification. The Gem Lab refractometer is an inexpensive model that’s a good...
Read More
Lapidary Fundamentals: Cutting Rough Stones

Lapidary Fundamentals: Cutting Rough Stones

Learn the best techniques and tools for cutting rough stones. Making small pieces from big pieces is one of the...
Read More
Lapidary Fundamentals: Cabochon Cutting

Lapidary Fundamentals: Cabochon Cutting

Cabochon cutting or cabbing is the most popular form of gem cutting. With practice, you can master this skill. Read...
Read More
Lapidary Fundamentals: Gemstone Tumbling

Lapidary Fundamentals: Gemstone Tumbling

Gemstone tumbling is the simplest and least expensive lapidary art to learn. These guidelines can help you choose the right...
Read More
Product Review, Achiever Microscope

Product Review, Achiever Microscope

A microscope is an essential tool for gemologists. The Achiever Microscope is an excellent choice at a good price. Read...
Read More
Lapidary Fundamentals: Gemstone Faceting

Lapidary Fundamentals: Gemstone Faceting

Learn the basic procedures of gemstone faceting. This walkthrough for a standard round brilliant cut gem includes cutting instructions and...
Read More
Angles for Cutting Garnets

Angles for Cutting Garnets

Cutting garnets and other color saturated gems for brilliance can be challenging. Here's some advice for choosing the best angles...
Read More
Choosing Faceting Angles

Choosing Faceting Angles

With so many recommended faceting angles, new gem cutters can have a hard time choosing one. Learn the basic guidelines...
Read More
Identifying Synthetic Gems

Identifying Synthetic Gems

Distinguishing between natural and synthetic gems is a critical skill for gemologists. Learn about gem making processes and the telltale...
Read More
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...
Read More
Color Grading Fancy Colored Diamonds

Color Grading Fancy Colored Diamonds

The color grading standards for white diamonds don't apply to fancy colored diamonds. Learn the GIA and Argyle grading systems...
Read More
A View of the Quartzsite Gem Shows

A View of the Quartzsite Gem Shows

The Quartzsite gem shows attract gemologists and rock hounds from around the world. Learn what to expect and how to...
Read More
Difficult Gemstone Separations

Difficult Gemstone Separations

Two of the trickiest gemstone separations to make are scapolite from citrine and apatite from tourmaline. Learn some tips for...
Read More
What Happened to the GIA GemSet Color and Hue Wheel?

What Happened to the GIA GemSet Color and Hue Wheel?

The GIA GemSet offered plastic color masters for color grading gems. It's no longer in production. Software alternatives exist but...
Read More
Combining Stones in Jewelry

Combining Stones in Jewelry

Combining stones can be more than adding diamond accents to colored gemstone jewelry. Explore colored stone combos and learn how...
Read More
Identifying Synthetic Diamonds

Identifying Synthetic Diamonds

Although most manufacturers disclose their synthetic diamonds, some resellers don’t. Learn how to identify these lab-created diamonds.
Read More
Gemstone Identification Quizzes: Testing Procedures

Gemstone Identification Quizzes: Testing Procedures

Gemstone identification can involve many tests. These quizzes can help novice gemologists learn to pick the appropriate ones and identify...
Read More
Buying Gems: Test Your Identification Skills

Buying Gems: Test Your Identification Skills

When buying gems, gemologists must temper their excitement with an analytical eye. Test your gem identification skills with these quizzes....
Read More
Gemology Cheat Sheets

Gemology Cheat Sheets

These gemology cheat sheets review gem color and clarity grading, specific information on evaluating diamonds and opals, and basic gem...
Read More
Gemstone Visual Examination Quizzes

Gemstone Visual Examination Quizzes

A visual examination is the first step to identifying a gemstone. These quizzes will help student gemologists learn to recognize...
Read More
Gemstone Refractometer Mini-Quiz

Gemstone Refractometer Mini-Quiz

Test your knowledge of refractometer gem analysis with this mini-quiz. You can review material on any question you miss at...
Read More
A Gem Identification Quiz for Novice Gemologists

A Gem Identification Quiz for Novice Gemologists

Learning how to identify gems involves more than just data. This gem identification quiz can help novice gemologists learn how...
Read More
The GIA Diamond Cut Grading System

The GIA Diamond Cut Grading System

How does the GIA diamond cut grading system work? Our guide will explain what the grades mean and how gemologists...
Read More
Gemstone Examination Lesson

Gemstone Examination Lesson

Learning how to conduct a gemstone examination takes practice. Follow an expert gemologist step-by-step through tests of five unknown samples....
Read More
Recommended Gemology Tools and Instruments

Recommended Gemology Tools and Instruments

Gemstone identification requires a good reference library and some basic gemology tools. Before you go shopping, learn more about what...
Read More
Dichroscope Guide for Gemologists

Dichroscope Guide for Gemologists

The dichroscope is one of the most useful instruments a gemologist can have. Its primary purpose is to determine the...
Read More
Ultraviolet Testing and Gemstone Identification

Ultraviolet Testing and Gemstone Identification

Ultraviolet testing can be crucial for gemstone identification. Learn the basics of this technique as well as how to make...
Read More
The Spectroscope

The Spectroscope

The spectroscope is a fundamental gemological tool. Learn how to use it to identify gemstones based on their absorption of...
Read More
Jewelry Metals 101: Gold, Silver, and Platinum

Jewelry Metals 101: Gold, Silver, and Platinum

Gold, silver, and platinum are the most commonly used jewelry metals. Learn about their physical properties, alloys, and history.
Read More
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...
Read More
Enhanced Gem Inclusions

Enhanced Gem Inclusions

Gem treatments can affect a stone’s value and stability. Learn how the most common procedures work and how to identify...
Read More
Corundum Treatments

Corundum Treatments

Corundum gems receive more types of treatments than any other stones. Learn how to test rubies and sapphires for signs...
Read More
How to Test for Diffusion Treated Gems

How to Test for Diffusion Treated Gems

Learn how to spot diffusion treated gems with a simple immersion test. This common treatment for sapphire can significantly reduce...
Read More
Using a Reticle: A Guide for Gemologists

Using a Reticle: A Guide for Gemologists

When combined with optical instruments, a reticle can take fine measurements. Learn how gemologists use this tool for measuring lengths...
Read More
HPHT Diamond Treatments

HPHT Diamond Treatments

HPHT diamond treatments can only be positively identified with costly equipment. However, you can learn to assess the probability that...
Read More
Center-Fused Color Treated Gemstones

Center-Fused Color Treated Gemstones

Center-fused color treated gems are assembled from natural rough. Learn how the procedure works and how to identify this stable...
Read More
A Beginner's Guide To Common Gemstone Heat Treatments

A Beginner's Guide To Common Gemstone Heat Treatments

Gemstone heat treatments can increase the beauty and value of many rough pieces. Learn how to conduct the most common...
Read More
Identifying Garnets Simplified

Identifying Garnets Simplified

Identifying garnets by species is complicated. Learn how to use refractive index, hue, and absorption spectrum readings to simply the...
Read More
Destructive Gemstone Tests: Dye Testing

Destructive Gemstone Tests: Dye Testing

Gemologists can use dye testing to determine if a gemstone has been dyed to alter its color. Learn how to...
Read More
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...
Read More
Destructive Gemstone Tests: Scratch Testing

Destructive Gemstone Tests: Scratch Testing

Gemstone scratch testing can help determine the Mohs hardness value of a mineral sample. Learn how to conduct this destructive...
Read More
The Minimum Cutting Technique for Gemstones

The Minimum Cutting Technique for Gemstones

The minimum cutting technique will help you get the largest gems possible from rough. Learn how to deal with internal...
Read More
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...
Read More
Carving Techniques for Handling Inclusions in Transparent Gems

Carving Techniques for Handling Inclusions in Transparent Gems

Inclusions don't have to result in a loss of mass or value when cutting transparent gems. Learn how to manage...
Read More
The Gemstone Butterfly Cut

The Gemstone Butterfly Cut

The Gemstone Butterfly is a stunning design for a custom-cut gem. Our step-by-step guide will show you how to facet...
Read More
Diamond Buying Guide - Special Free Preview

Diamond Buying Guide - Special Free Preview

First-time gem buyers may find diamond grades confusing. Our consumer guide explains how diamonds are evaluated and gives advice on...
Read More
Frosted Stars: Variations on Star-Cut Gemstones

Frosted Stars: Variations on Star-Cut Gemstones

“Frosted Stars” are variations on classic five and six-pointed star-cut gemstones. Learn how to facet these gem designs and make...
Read More
How to Add Sparkle to an Emerald Cut

How to Add Sparkle to an Emerald Cut

Add sparkle to an emerald cut with a new cutting technique. You can apply this design to gemstones with standard...
Read More
Destructive Gemstone Tests: Streak Testing

Destructive Gemstone Tests: Streak Testing

Streak testing is a destructive gemstone test rarely used by gemologists. Most gems leave no streak. Learn which gems do...
Read More
Calcareous Concretions Value, Price, and Jewelry Information

Calcareous Concretions Value, Price, and Jewelry Information

Several species of marine mollusks produce stony growths called calcareous concretions or non-nacreous pearls. Varieties such as conch pearls, tridacna...
Read More
Tips for Cabbing and Carving Opals

Tips for Cabbing and Carving Opals

Opal cabochons can fetch high prices but may be difficult to cut. These tips for carving opals can help gem...
Read More
Uncommon Elements Make Uncommon Gemstones

Uncommon Elements Make Uncommon Gemstones

Why are some gems so rare in nature? Learn which elements in the Earth’s crust are the rarest and how...
Read More
An Introduction to Gemology

An Introduction to Gemology

Learn what gemologists do in our introduction to gemology. Whether your interest is casual or professional, the world of gems...
Read More
Chicken-Blood Stone Value, Price, and Jewelry Information

Chicken-Blood Stone Value, Price, and Jewelry Information

One of the most prized ornamental materials in China, chicken-blood stone has been used for centuries to create carvings with...
Read More
A Guide to Gem Cutting Styles

A Guide to Gem Cutting Styles

Gem cutting styles refer to the shape and arrangement of facets. The three most basic styles are brilliant, step, and...
Read More
Gemstone Facets: Terminology and Functions

Gemstone Facets: Terminology and Functions

Not only do gemstone facets create beautiful patterns on gem surfaces, they also help gems shine. While gem cutters will...
Read More
An Introduction to the Lapidary Arts

An Introduction to the Lapidary Arts

Lapidary is the art of working with gemstones. Learn more about the four basic lapidary arts: tumbling, cabbing, faceting, and...
Read More
Identifying Inclusions of Specific Gems

Identifying Inclusions of Specific Gems

Some natural as well as synthetic gems have specific, characteristic inclusions. Learn the identifying inclusions of some of the most...
Read More
Color Grading White Diamonds

Color Grading White Diamonds

Mastering the art of color grading white diamonds is a challenge. Learn about the standards, terms, tools, and testing procedures...
Read More
Evaluating Gem Color: Hue, Tone, and Saturation

Evaluating Gem Color: Hue, Tone, and Saturation

Accurately describing gem color is critical to determining a gemstone's value. Learn how to grade hue, tone, and saturation and...
Read More
Advanced Cutting Techniques For Cabochons

Advanced Cutting Techniques For Cabochons

Leftover gemstone rough is a great material for learning to cut cabochons. Learn advanced cabbing techniques and find new inspiration...
Read More
The Art and Science of Identifying Gemstones

The Art and Science of Identifying Gemstones

Learn how to identify gems using gemology tools and the Gemology Tools software, which makes it easier than ever to...
Read More

An Introduction to Jewelry and Metalsmithing Tools

Manufacturing jewelry is a great way to tap into your creative side along with having something cool and original to...
Read More
Product Review, Opal Smart Chart

Product Review, Opal Smart Chart

The newest thing in the opal world is the Opal Smart Chart. This is a software package designed to help...
Read More
Spodumene Value, Price, and Jewelry Information

Spodumene Value, Price, and Jewelry Information

Extraordinarily difficult to cut, spodumene has several colorful varieties, such as hiddenite and kunzite, highly coveted for jewelry.
Read More
Product Comparison, Polariscopes

Product Comparison, Polariscopes

Polariscopes are one of our most useful instruments. They come in a wide variety of prices and qualities. There are...
Read More

Product Review, GemPro 50, Digital Scale

The least expensive digital scale for gem use is now the GemPro 50. It sells for around $150, which is...
Read More
Product Review, Sony Cyber-shot

Product Review, Sony Cyber-shot

A Product Review on Sony Cyber-shot. Overall, it is an excellent camera and I was surprised by the low cost.The...
Read More
Product Review, Opal The Smart Chart

Product Review, Opal The Smart Chart

The newest thing in the opal world is the Opal Smart Chart. This is a software package designed to help...
Read More
Product Review, Diamond Calculator

Product Review, Diamond Calculator

There is a new piece of software available that will be of interest to many of you. It is called...
Read More
Living With Your Faceting Machine

Living With Your Faceting Machine

One serious pitfall for the novice is the quality of advice they get in choosing what faceting machine to buy....
Read More

Faceting Machine Survey

Recently, a survey was taken to see what kind of Facet Machines are being used by members of the Faceter's...
Read More

Australian International Faceting Challenge 2000

The Australian International Faceting Challenge is a competition to see a cutters ability to cut a perfect stone. With designs...
Read More
Synthetic Gemstone Inclusions

Synthetic Gemstone Inclusions

Identifying lab-created gems is a critical skill for gemologists. Learn how to spot the most common synthetic gemstone inclusions.
Read More
How to Build a Home Gemology Laboratory

How to Build a Home Gemology Laboratory

Learn what you need to set up a your own gem lab. You may be surprised to learn that this...
Read More
How to Make a Beaded Necklace

How to Make a Beaded Necklace

An overview on How to Make a Beaded Necklace. Detailed information on the tools, materials, designs and techniques on making...
Read More
How Rare is That Gem?

How Rare is That Gem?

Rarity is one of the most prized qualities of gemstones. But some gems are far more rare than others! This...
Read More

Finding a job in the gem or jewelry business

This is a quick story about finding employment (a job) in the gem or jewelry industry. It explains why starting...
Read More

Test Taking Tips and Strategies

Learn these quick and simple test taking tips and strategies to help you on your next gemology test.
Read More