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A large group of people outside on GIA’s Carlsbad, California  campus.
Article
Guardians of Trust: GIA’s Innovative Research, Instruments and Services

GIA’s services and instruments have grown in importance and impact as new gem treatments and laboratory-grown gems have entered the market.

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A group of rough sapphires encircle cut sapphires.
Article
Montana Yogo Sapphires’ Unique Gemmology

A look at the mining and distinguishing characteristics of this naturally vibrant blue sapphire.

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Indian necklace
Article
Jewellers to the Maharajas of Jaipur and Modern-Day Moguls

Enter a world not well-known in the West—the world of the maharajas and their jewellery, coveted by the modern-day moguls of business, entertainment and royalty. See the fantastic works of art made today in the form of enamelled Kundan meena jewellery and the regal look of polki diamonds.

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Article
Spring 2015 G&G Examines Blue Spinel, Chinese Jewellery Design and the Latest in Synthetics

G&G Brief presents an overview of the content of the Spring 2015 issue of Gems & Gemology.

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Article
Summer 2015 G&G: Dual-Stars, Photomicrography Guide, Rubies from Tajikistan, New Micro-World Section

G&G Brief presents an overview of the content of the Summer 2015 issue of Gems & Gemology.

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Diagnostic Features and Heat Treatment of Kashmir Sapphires

Today, only by combining different gemmological tests with years of practical experience, can a conclusive determination of the origin of a sapphire be made.

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Tairus Hydrothermal Synthetic Sapphires Doped with Nickel and Chromium

Researchers from the Tairus joint venture have developed the technology for the hydrothermal growth of gem-quality crystals of synthetic sapphire.

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Abstract Header from the 2009 issue of Gems & Gemology
Abstracts; Winter 2009

This article, from the Winter 2009 issue of Gems & Gemmology, is a compilation of abstracts of important gemmology-related articles published outside of Gems & Gemmology.

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Abstract Header from the 2009 issue of Gems & Gemology
Abstracts; Autumn 2009

This article, from the Autumn 2009 issue of Gems & Gemology, is a compilation of abstracts of important gemmology-related articles published outside of Gems & Gemology.

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Abstracts; Winter 1991

This article, from the Winter 1991 issue of Gems & Gemmology, is a compilation of abstracts of important gemmology-related articles published outside of Gems & Gemmology.

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