News & Articles

Color Classification and Stability of Queen Conch Pearls

Color stability experiments show that the color of Queen conch shell and pearls may shift in hue and/or saturation under X-ray radiation or short-wave UV radiation.

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Coronavirus May Cut Chinese Demand, Diamond Companies See Better Times

Economic impact of the coronavirus. Plus, an update on the diamond market and gold jewelry.

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Diamond Lattice Defects: GIA Researchers Explore Internal Tagging and Gray-Blue-Violet Diamond Color

GIA scientists recently presented their latest research on diamond tagging and the cause of gray-blue-violet color in diamonds at the Princeton-GIA Diamond Symposium.

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Man stands in front a GIA banner that features gemstones.
The ABCs of Pearls Reveal Fascinating Aspects of Gems from the Deep

Talk presents little known and fascinating facts about pearls.

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Winter 2019 G&G: Geographic Origin Special Issue

An overview of the Winter 2019 Gems & Gemology content.

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The Real Gemology of Ethiopian Opals in ‘Uncut Gems’

Taking a look at the rough opal that plays a major role in the Adam Sandler film “Uncut Gems.”

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