Search results for: sapphire - Page 2 | International Gem Society

Fun With Gems: US Buyers Are Reinterpreting What It Means to Be a “Precious” Gemstone

In the nineteenth century, the gemstone market was separated into two broad categories: precious and semi-precious. The four gems in...

Milestone Anniversary Jewelry and Gemstone Gift Buying Guide (Traditional and Modern Gifts)

Knowing what to get for an anniversary can be tough. Jewelry is always a lasting, thoughtful, and sentimental way to...

Anniversary Gifts By Year

The anniversary gift for year 1 is gold, and the anniversary gift for year 2 is garnet. Our chart tells...

Gemstones That Make Money

What kinds of gems can novice faceters cut to make a profit? Learn which gemstones make money reliably and which...

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...

Kashmire 1.33: Faceting Design Diagram

Successful tips and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this...

Alternative Birthstones

Not happy with your birthstone? Explore these alternative birthstones associated with astrological signs, angels, the hour or day of your...

10 Rare Engagement Ring Stones that Won’t Break the Bank

Not all rare gemstones cost a fortune. If you’re looking for something different but affordable for your wedding, here are...

Point Mounty: Faceting Design Diagram

Successful tips and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this...

3-Triangle: Faceting Design Diagram

Detailed information and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this...

Blue Gemstones: 37 Varieties, Properties & Care Guide

Explore 37 blue gemstones from rare collectors' specimens to durable jewelry options. Learn how to assess quality, understand durability factors,...

Take the Birthstone Quiz

What do you know about birthstones? Take our short birthstone quiz and learn about the makeup, cutting, and value of...

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...

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...

Gemstone Magnetism: The Forgotten Property

Although gemstone magnetism isn't commonly tested, it can help gemologists distinguish similar looking gems. Learn how to analyze this property....

Pricing Information For Star Opals From Spencer, Idaho

Some opals from Spencer, Idaho show asterism or the “star stone” effect. Learn how to price these beautiful but rare...

Engagement Ring Setting: What’s Your Style?

Choosing a setting is the most important decision when shopping for a ring. Read about your options in this comprehensive...

Precision Faceting a Story Gemstone: Custom Faceting Advice

Your prized gemstones deserve custom faceting. Learn the benefits of working with precision faceters and tips for starting your own...

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...

Are Serengeti Rubies Real Rubies?

Although Tanzania is a source of rubies, so-called Serengeti rubies are more likely to be garnets. Learn more about rubies...

Walking Star: Faceting Design Diagram

Successful tips and guide on Faceting Designs. A Faceting Design Diagram by Jeff R. Graham that presents various cuts, this...

Common Gemstone Treatments Cheat Sheet

There are so many common gemstone treatments available today that keeping track of them can be difficult. This list and...

Tanzanite Buying Guide

Master tanzanite buying with our expert guide covering the 4 Cs, treatments, simulants, and investment tips. Learn to identify quality...

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...

$Refractometer Guide, Part 1: Refractive Index Testing$

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...

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...

Sapphire: Raw stone. Help! Advice needed from trimming to sale

...r having me & TIA for your help I'm looking for a deeper understanding on all aspects regarding raw sapphire. Basic stone details; Unassessed, Raw, Untreated. Ranging from 1 to 45ct Color spectrum from orange...

sapphire with inclusions of mic

Hello Miss, Sir I would like to contact you to request information regarding a sapphire that I own. It is an opaque sapphire that I bought in a flea market in Paris with a weight of 6900...

Montana Sapphire vs Australian Sapphire — How Do They Differ?

...t Navneet Gems are hoping to learn from the community's experience with both Australian and Montana sapphires. We'd love to hear your thoughts on the similarities and differences between the two origins. A fe...

Montana Sapphires

Hello IGS Community, I wanted to make a quick post showing how these sapphires from the Treasure State (Montana) turned out. Here I have these Montana sapphires that I received...

44.07 ct Milky Grey Star Sapphire

...y The most comparable I could find this color , origin, weight , grading of star was on the natural sapphire company website . I found a 50 ct very similar to this one that I just got . It was priced out at 3...

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