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Latest Articles

GemEx iLoupe Review

How does the GemEx iLoupe compare to a standard jeweler’s loupe? Our review tests the device and app, designed for smartphones and tablets.
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 to report your findings clearly.…

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…
Identifying Jade Treatments

Jade is one of the most popular and expensive gemstones. It can also receive many enhancements. Learn about jade treatments and how to identify…

How to Build Pocket Crossed Filters for Gemstone Testing

The crossed filters technique allows gemologists to detect chromium in gems. Learn how to build a portable device for conducting this useful ID…
Peridot Buying Guide

Our peridot buying guide can help you learn how these gems are graded, what to avoid, and how to identify a high quality stone or a bargain in the rough.…

Benitoite Value, Price, and Jewelry Information

With dispersion higher than diamond and sapphire-blue body color, benitoite is one of the most attractive of all rare gems. Gem-quality crystals…

Helping Clients with Inherited Gemstones and Jewelry

Gem dealers are often their clients’ most trusted advisers on gem matters. Learn how to help your clients with inherited gemstones and jewelry.…

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 is natural…

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