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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GIA researchers in New York recently had the opportunity to examine one of the most interesting and unique diamond crystals ever found.
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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Presents spectroscopic and phosphorescence data of the Blue Moon, a 12.03 ct Fancy Vivid blue diamond discovered at the historic Cullinan mine in early 2014.
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A report on a 1,138 ct rough diamond, possibly the largest ever examined by GIA.
Read MoreThe source of colour in some diamonds, particularly fluorescent green and some yellow stones, can be very difficult to identify despite increasing knowledge about the radiation-related bands seen in the visible spectra of diamonds.
Read MoreUsing a multi-step process, Lucent Diamonds has developed a new treatment process for certain natural diamonds that creates colours from pink-purple to red to orangey brown.
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GIA researcher analyses and confirms that De Beers’ Lightbox diamonds are grown using the chemical vapour deposition process.
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Analysis of a 5.03 ct HPHT-grown blue synthetic diamond, the largest ever examined by GIA.
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