Summarises data collected on more than 15,000 natural blue/grey/violet diamonds examined by GIA during the last decade and examines the mechanisms that produce this colour range.
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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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A marquise-cut diamond is found to have been broken and reassembled with an unknown adhesive.
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Overview and commentary on the 2014 Optics & Photonics News article “Diamond Raman Lasers”.
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GIA researchers in New York recently had the opportunity to examine one of the most interesting and unique diamond crystals ever found.
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DiamondView is used to differentiate a Fancy black natural diamond from its NPD synthetic counterparts.
Read MoreDr James Shigley, GIA distinguished research fellow, is one of the foremost experts in diamonds and their identification. In this presentation recorded at the 2017 JCK Las Vegas show, he shares the latest developments about HPHT and CVD synthetic diamond
Read MoreThe author reports on a sudden influx of natural fancy pink diamonds and their origins.
Read MoreHigh-quality synthetic diamonds created by the Gemesis Corp. are examined and their gemmological properties are explicated.
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This article explores and identifies the changes that type IIa GE POL diamonds experience before and after HPHT annealing.
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