Unheated Sapphires

Sapphire and Diamond Ring

Sapphire and Diamond Ring

Sapphires and rubies are among the best known gems in the world, the gems flowing through the hands of storybook pirates when they delve into their treasure chests. The gems that are entirely untreated, and are the colour they were when they were mined are very rare, and are most sought after. This pink sapphire has needle-like inclusions, the tell-tale indicators that there has been no heat applied to the gem. These needles, seen through a microscope, in a sapphire are arranged in three directions at 60 degree angles to each other, and are found in this sapphire, lot 80, in the upcoming Dupuis auction, November 24, 2013. for more information go to: http://bit.ly/1bAYQiF

Needle-like inclusions

Needle-like inclusions

Duncan Parker

About Duncan Parker

Duncan Parker, FGA, FCGmA, CAP (CJA), Vice President. Duncan is a columnist and contributor for industry magazines and journals. He has been an instructor of the gemstone course at Ryerson University, the Gemmology courses of George Brown College and Canadian Gemmological Association as well as instructor Master Valuer Program with the Canadian Jewellers Association. A renowned expert, he speaks regularly at international gem and jewellery conferences and symposiums, as well as at less formal events. He has served as President of the Canadian Gemmological Association since 1995. Before joining Dupuis Auctioneers, Duncan was a director of research at Harold Weinstein Ltd., a leading and respected jewellery appraisal company.
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