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GIA Gem Project
Various Gems (Taaffeite - Zoisite)

Among the collection assembled by Dr. Edward Gübelin are a number of uncommon gemstones from many worldwide localities.

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Multi-colored gems are superimposed on an image of glacier peaks.
Article
Gems and Minerals from the Subarctic

Circumnavigate the boreal reaches of the globe to explore gems from polar regions.

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Worker attaching wax forms
Article
Shenzhen: The Frontier of China’s Gem and Jewelry Industry

All jewelry professionals are familiar with the city of Shenzhen, a global jewelry manufacturing center and a leader of China’s fast-growing gem and jewelry industry. Join the GIA team as we tour the city and discover more about its leading jewelry brands.

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Pink Topaz from Pakistan

Pakistan has begun to produce fine gem-quality pink topaz.

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Topaz, Aquamarine, and Other Beryls from Klein Spitzkoppe, Namibia

This article presents, for the first time, both gemological and geologic information on topaz, aquamarine, and other beryls from miarolitic pegmatites at Namibia’s historic Klein Spitzkoppe mineral locality.

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An Update on Imperial Topaz from the Capao Mine, Minas Gerais, Brazil

The Capao mine is one of the oldest and most productive fully mechanized Imperial topaz mines in the historic Ouro Preto area of Minas Gerais, Brazil.

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The Capão Topaz Deposit, Ouro Preto, Minas Gerais, Brazil

This article examines the history of the Ouro Preto district as well as the geology of the area and occurrence of the topaz.

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Sri Lanka: The Gem Island

An overview of the many types of gem-quality material, and its inclusions, currently found in Sri Lanka.

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Irradiated Topaz and Radioactivity

Large quantities of colorless topaz are currently being treated by gamma irradiation to turn them blue.

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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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