featured Research & News


Remarkable Twinned Calcite Inclusion in Mogok Ruby

A clear example of calcite twinning is found in a ruby from the Mogok Stone Tract. Read More
Circular logo with the words “International GIA Gemological Symposium” around the outside and a star with a diamond center in the center circle.

2018 GIA Symposium

Symposium has revealed the discoveries, opportunities and insights that move businesses forward. Seats are limited. Register today.
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Diamond with uneven “lizard skin” surface texture.
Lab Note

Lizard Skin on Deformed Diamond

The surface texture of a diamond is affected by the gemstone’s structure. Read More
A male retail jeweler helps a woman look at a diamond through a loupe.
Industry Analysis

Reports Indicate Continued Economic Growth

Holiday jewelry sales in the U.S. increased in 2017, according to a several industry and economic reports. Updates on diamond markets and challenges.
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Shattuckite typically forms aggregates of circular to spherulitic masses composed of acicular crystals

Quarterly Crystal: Shattuckite in Quartz

A quartz crystal from Namibia, hosting of spherulitic to circular masses of shattuckite, is examined.
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