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Color zoning in amethyst from Boudi, Morocco
Amethyst from Boudi, Morocco

An introduction to Moroccan amethyst, which features distinctive color zoning and inclusions.

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Article
GIA Gem Project
Various Gems (Olivine - Rutile)

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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Amethyst from Four Peaks, Arizona

For more than a century, the Four Peaks mine in Maricopa County, Arizona, has produced gem-quality amethyst.

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Amethyst Mining in Brazil

Brazil is currently the leader in overall production of amethyst.

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Amethystine Chalcedony

"Damsonite," the trade name for a new type of chalcedony, is analyzed and described.

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A Status Report on Gemstones from Afghanistan

An overview of the plentiful and various gem materials being discovered and produced in Afghanistan.

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Artificially Induced Color in Amethyst-Citrine Quartz

A new and rather unusual gem material and possible treatments are discussed.

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Abstracts; Fall 1991

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

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