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Hands hold a split open shell that shows the natural pearl.
Article
Get Started on 2017 Continuing Education Recognition Program

This media-rich, interactive program makes it possible for GIA graduates to stay up to date with the latest gem and jewelry news and information.

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Vania Leles
Article
A New World of Glamour: Former Model Launches Fine Jewelry Brand

Vania Leles earned her GG from GIA in London in 2004 and promptly sent her curriculum vitae to Graff Diamonds on Bond Street for her dream job.

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Turquoise-Rock Crystal Composite

Examination of a faceted rock crystal backed by a slice of turquoise—an obvious but unusual combination of gem materials.

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An Opal-Calcite Composite

Gem Testing lab in Jaipur, India recently examined a white-brown, translucent to opaque oval cabochon that turned out to be a composite featuring an unusual combination of gem materials.

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Ammolite: Iridescent Fossilized Ammonite from Southern Alberta, Canada

Ammolite is a form of aragonite that is obtained from vivid iridescent fossilized ammonite shells mined in Alberta, Canada.

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Confusing, Triangular Inclusions in an Art Deco-Style Pin
Spring 1991 G&G Lab Notes

This section, from the Spring 1991 issue of Gems & Gemology, is a compilation of interesting finds from GIA’s laboratories.

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The Early History of Gemstone Treatments

The author has uncovered many ancient references to the simulation or enhancement of gemstones.

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Abstracts; Summer 1996

This article, from the Summer 1996 issue of Gems & Gemology, is a compilation of abstracts of important gemology-related articles published outside of Gems & Gemology.

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Composite Amber with an Unusual Structure

This 9.12 gram amber composite featured a combination of natural and imitation amber, accompanied by natural and artificial insect inclusions.

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