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A rare blue diamond on Wednesday sold in Geneva for just over $17 million, as Sotheby's eyed total sales in excess of $100 million at the autumn jewel auctions. The 8.01-carat "Sky Blue" diamond in a ...

The 8.01-carat "Sky Blue" diamond in a Cartier setting was snapped up for $17.1 million (15.9 million euros), a hike of 33 percent on the $12.8 million it sold for in 2012, said the auction house's ...