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.
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An examination of the gemmological and spectroscopic properties of CVD synthetic diamonds from Gemesis Corp.
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Knowledge of type allows gemmologists to better evaluate if a diamond might be treated or synthetic, and whether it should be sent to a laboratory for testing.
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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 MoreSynthetic moissanite is much closer to diamond in overall appearance and heft than any previous diamond imitation; this article reports on how to identify and characterise it.
Read MoreBrown-to-grey and near-colourless single-crystal type IIa synthetic diamonds grown.
Read MoreGreenish yellow to yellowish green HPHT-treated diamonds exhibited highly saturated body colour, well-defined brown to yellow octahedral graining and visual evidence of heating, among other characteristics.
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A survey of recent advances in CVD synthetic diamond quality.
Read MoreWith the information from a combination of tools now available, the sophisticated gemmologist can fingerprint a given stone.
Read MoreThe first substantiated identification of corundum (var. ruby) occurring as an inclusion in natural diamond is presented.
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