News & Articles

Gem materials and in front of rare books.
Top 10 Digital Reads from the GIA Library

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Three round brilliant diamonds in a row
GIA Researchers Evaluate ‘Light Performance’ and Diamond Cut

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A large yellow cushion cut diamond pendant is partially framed with marquis cut diamonds and hangs from a necklace of mixed cut diamonds.
Yellow Gemstones: Can You Identify Them?

A variety of gemstones come in shades of yellow, from diamonds to citrine to garnets.

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Man stands in front of an audience giving a lecture – projection screen with image to his right.
Not All That Glitters is Gold — Sometimes it is Mozambican Rubies

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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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A large group of people in a hallway.
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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