Check out some of the most interesting and unusual diamonds and coloured stones submitted to GIA’s laboratories in 2019.
Read MoreG&G Brief presents an overview of the content of the Autumn 2015 issue of Gems & Gemology.
Read MoreG&G Brief presents an overview of the content of the Summer 2015 issue of Gems & Gemology.
Read MoreStrong absorptions from N-V centres were the main cause of a CVD synthetic diamond’s pinkish orange bodycolour.
Read MoreA look at the first CVD synthetic diamond examined at GIA that has been irradiated to a blue colour.
Read MoreExamination of two CVD synthetic diamonds with an unusual Fancy Dark grey colour.
Read MoreExamination of the properties of a synthetic moissanite specimen submitted as a black diamond.
Read MoreGIA's identification of a large diamond as artificially irradiated based on careful spectroscopic analysis and lab database review.
Read MorePink CVD lab-grown products can be separated from natural and treated-colour natural pink diamonds by a combination of gemmological and spectroscopic properties, which are explored in this study.
Read MoreKnowledge 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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