Sumitomo Electric Industries is producing gem-quality synthetic yellow diamonds in deep yellow single crystals in sizes up to 2 ct.
Read MoreTwo new categories of grey-to-blue diamonds are described.
Read MoreKnown for their great beauty and rarity, pink diamonds have long been sought after by jewellers, collectors and consumers.
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 MoreSome treated yellow and blue-to-green diamonds show a peculiar colour zoning when viewed through the pavilion.
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 MoreThis article compares some of Chatham Created Gems’ synthetic coloured diamonds to natural diamonds and explains the results.
Read MoreThe stories behind seven strikingly beautiful rare natural diamonds, united in an exhibit at the Smithsonian, are told here.
Read MoreA large number of natural-colour yellow diamonds are analysed using grading and appearance aspects among other characteristics to clarify the differences between them and the light yellow diamonds associated with GIA's D-to-Z colour grading scale.
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A behind-the-scenes exploration of the Smithsonian's Janet Annenberg Hooker Hall of Geology, Gems and Minerals.
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