News & Articles

Gems & Gemology Spring 2024 In Brief
Spring 2024 G&G Available Now

An overview of the Spring 2024 Gems & Gemology content.

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Sun setting over water in Northern Madagascar
Gems of Northern Madagascar Video with GIA Field Gemology

Madagascar, a gemstone wonder, is explored by GIA's Field Gemology Manager, Wim Vertriest. He retraces the island's gemstone history and shares experiences from a recent expedition to two remote mines in Northern Madagascar: a demantoid and a sapphire mine.

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Hand holding demantoid garnet rough in matrix.
The Latest in Field Gemology from Wim Vertriest: Sapphires and Demantoid Garnets from Northern Madagascar

Researchers examined one of the most interesting and unique diamond crystals ever found.

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Hand holding demantoid garnet rough in matrix.
The Latest in Field Gemology from Wim Vertriest: Sapphires and Demantoid Garnets from Northern Madagascar

Learn the latest on Madagascar sapphires and demantoid garnets from Wim Vertriest, GIA Manager of Field Gemology.

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Gems & Gemology Winter 2023 In Brief
Winter 2023 G&G Available Now

An overview of the Winter 2023 Gems & Gemology content.

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Gems & Gemology Fall 2023 In Brief
Fall 2023 G&G Available Now

An overview of the Fall 2023 Gems & Gemology content.

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