A diamond is proven to have a superdeep origin through an inclusion of CaSiO3-walstromite.
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Characterises a suite of 40 natural brown to black diamonds from this deposit so that they can be distinguished from suspected treated black diamonds.
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Explores an exceptional family of diamonds, referred to as “CLIPPIR” (Cullinan-like, Large, Inclusion-Poor, Pure, Irregular and Resorbed), that formed in a super-deep environment.
Read MoreDr Evan Smith, Ph.D., GIA research scientist, has dedicated his work to methodically characterising the inclusions found in rare diamonds. In this video presentation recorded at the 2017 JCK Las Vegas show, Smith shares his findings on the unexpected ori
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G&G Brief presents an overview of the content of the Winter 2015 issue of Gems & Gemology.
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GIA’s postdoctoral programme gives researchers access to gemmological data, equipment, and rare, unusual and large gems in its laboratories.
Read MoreThis article chronicles the discovery of primary diamond deposits throughout Canada, whose increasing supply of rough stones will have a growing impact on the world diamond industry.
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G&G Brief presents an overview of the content of the Spring 2015 issue of Gems & Gemology.
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This article, from the Summer 2009 issue of Gems & Gemmology, is a compilation of abstracts of important gemmology-related articles published outside of Gems & Gemmology.
Read MoreThis article presents the first complete gemmological characterisation of the historic 128.48 ct Brazilian diamond known as the Star of the South.
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