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Diamond Fun Facts

Learn more about one of the Earth’s most fascinating creations, including some that became the most famous.

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Article
Fall 2015 G&G: Trapiche Emeralds, Synthetic Diamonds and a Large Diamond Source

G&G Brief presents an overview of the content of the Fall 2015 issue of Gems & Gemology.

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Article
A Sunstone Odyssey, Part 2: The Dust Devil

The "Sunstone Odyssey" series continues with a visit to the Dust Devil mine, a source of rough for many award-winning faceted gems and carvings.

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A close-up image of a pile of rough diamonds.
Article
Ups and Downs of 2016 Make for an Uncertain 2017

The diamond industry was slow to recover in 2016 and colored gems got a welcome shot in the arm. Mixed signals leave no clear indicators for 2017.

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Large rough diamonds sit on a mirror.
Article
Russia’s Lomonosov Diamond Project Shows its Fancy Colors

Lomonosov yields fancy colors – purplish pink, violet, green, yellow and brown – and a high percentage of gem-quality colorless (D-to-Z) diamonds.

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Hydrogen-rich Diamonds
Gray-To-Blue-To-Violet Hydrogen-Rich Diamonds from the Argyle Mine, Australia

The Argyle diamond mine is the only known source of type IaB hydrogen- and nitrogen-rich diamonds colored gray to blue to violet.

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Article
Summer 2015 G&G: Dual-Stars, Photomicrography Guide, Rubies from Tajikistan, New Micro-World Section

G&G Brief presents an overview of the content of the Summer 2015 issue of Gems & Gemology.

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An Investigation into the Cause of Color in Natural Black Diamonds from Siberia

Black and dark gray diamonds from Siberia, Russia, were studied by analytical scanning and transmission electron microscopy.

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Confusing, Triangular Inclusions in an Art Deco-Style Pin
Spring 1991 G&G Lab Notes

This section, from the Spring 1991 issue of Gems & Gemology, is a compilation of interesting finds from GIA’s laboratories.

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Pink Diamonds from Australia

The author reports on a sudden influx of natural fancy pink diamonds and their origins.

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