Chameleon diamonds are among the rarest of gem diamonds.
Read MoreNumerous natural-colour coloured diamonds from the Aurora Butterfly of Peace and other collections were studied using a new type of fluorescence spectrometer.
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.
Read MoreNapoléon Bonaparte gave an extraordinary diamond necklace to his empress, Marie-Louise, in 1811.
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.
Read MoreOne of the most popular exhibits at the Smithsonian Institution, the stunning Fancy Dark greyish blue Hope diamond was formally graded by GIA’s gem laboratory.
Read MoreModern gemmologists and diamantaires are faced with a broad spectrum of colour and clarity treatments ranging from the simple to the highly sophisticated.
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.
Read MoreSome treated yellow and blue-to-green diamonds show a peculiar colour zoning when viewed through the pavilion.
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