Reports preliminary findings—based on FTIR and Raman spectrometry of more than 300 samples—on distinguishing natural and synthetic emeralds using vibrational spectroscopy.
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Examines the growing percentage of rough diamonds being sold through auctions, a shift that has caused price volatility while opening up supply to more manufacturers and dealers.
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Describes the extremely rare polished pink diamonds from Australia’s Argyle mine that have been sold for 30 years through invitation-only tenders.
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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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Offers a first-hand look at Sri Lanka’s mining, cutting, jewellery manufacturing and retail sectors, where tradition and innovation converge.
Read MoreBlue sapphires from China are similar to gem corundum from Australia, Thailand, and Kampuchea (Camodia).
Read MoreThailand has become the world's major source of gem ruby.
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During the past 25 years, the corundum market has been transformed from one of medium to high-priced gems to one that encompasses nearly all price ranges.
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