Jewelry Blog

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One of the rarest blues diamond that Sotheby’s have auctioned ever was sold at premier jewelry auction in Geneva on May 12. It weighs 7.03 ct and is smaller than a penny piece. This expensive blue diamond was found in Cullinan mine in South Africa last year, and its clarity was graded as flawless – the highest designation. Pre-sale estimate price was $US 5.8-8.5 million. But in fact it was sold for a record 10.5 million Swiss francs ($9.5m; £6.2m). Auctioneer David Bennett said: “It is a new world record price for a blue diamond.”

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