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Colombian Emeralds
Classifying Emerald Clarity Enhancement at the GIA Gem Trade Laboratory

One of the greatest concerns with emerald filling is the degree of clarity enhancement such treatment represents

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Emerald rough
Article
Jaipur, India: The Emerald Cutting and Trading Powerhouse

Jaipur, India, is a leading emerald cutting and trading center for the global gem and jewelry industry. See inside the industry with a GIA field team, and learn the intricacies of a business seldom seen by the public or most members of the industry.

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Article
Living ‘Miracle to Miracle’: Gemologist Reflects on 30 Years in the Colombian Emerald Trade

Graduate’s fascination with gems began in GIA’s warehouse and put him on a fast track to becoming an expert on Colombian emeralds.

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On the Identification of Various Emerald Filling Substances

Criteria for distinguishing emerald filling substances were investigated.

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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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Emeralds of the Panjshir Valley, Afghanistan
Emeralds of the Panjshir Valley, Afghanistan

With the withdrawal of Soviet troops from Afghanistan, villagers in the Panjshir Valley are turning their attention to the emerald riches of the nearby Hindu Kush Mountains.

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Opticon Treatment
Fracture Filling of Emeralds Opticon and Traditional "Oils"

The filling of surface-reaching breaks in emeralds is a relatively common practice, for which various kinds of oils and a natural resin have historically been used.

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The Oil Treatment of Emeralds in Bogotá, Colombia

This article focuses on Colombian emeralds and gives a detailed explanation of the oiling process as observed by the author.

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Abstracts; Spring 1991

This article, from the Spring 1991 issue of Gems & Gemology, is a compilation of abstracts of important gemology-related articles published outside of Gems & Gemology.

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Abstracts; Summer 1991

From the Summer 1991 issue of Gems & Gemology, a summary of important gemology-related articles published in other journals.

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