"Oppenheimer Blue" diamond sells for new record

GENEVA -- The "Oppenheimer Blue" diamond sold Wednesday for more than 56.8 million Swiss francs ($58.2 million) including fees, setting a new record for the per-carat price for a diamond.

Capping a lively and even laughter-filled auction at Christie's, the hammer came down to applause as the 14.62-carat stone, billed as the largest Vivid Blue diamond ever put up for auction, went to an unidentified buyer for a hammer price of 50.6 million Swiss francs ($51.3 million) - which excluded fees and the buyer's premium - for a per-carat price of more than $3.5 million.

That obliterated the pre-sale estimate range of between 38 million and 45 million francs.

The record for the most expensive diamond ever sold at auction belongs to an 813-carat white diamond that fetched $63 million last week.

The previous record sale for any diamond was $48.5 million for the 12.03-carat polished "Blue Moon" diamond in Geneva last year.

The rare "Blue Moon" diamond is displayed at Sotheby's auction rooms in London Sept. 17, 2015. AP Photo/Kirsty Wigglesworth

Christie's spokeswoman Alexandra Kindermann said the bidding for the "Oppenheimer Blue" lasted over 25 minutes for the single lot, after starting at 30 million francs. The anticipation was often marked with tense pauses, groans and laughter.

The rectangular-cut diamond has been set in a ring and flanked by two smaller trapeze-shaped diamonds. The stone got its name from the late Sir Philip Oppenheimer, who long oversaw De Beers mining and had given the stone to his wife.

In diamond-business parlance, "provenance" matters. Raymond Sancroft-Baker, Christie's director of European jewelry, said Oppenheimer "had the pick of all diamonds over a 50-year period, and this is what he picked out for his wife."

"There's been several other blue diamonds which have been sold in the past, but nothing really quite of this quality," Sancroft-Baker said, adding that while the stone wasn't internally flawless, it was "nearly perfect."

The sale rounded out a two-day run of big-ticket jewelry auctions in Geneva. At Sotheby's on Tuesday, a vivid, pearl-shaped pink diamond said to be the largest of its kind to go under the hammer sold for 27.3 million Swiss francs ($28 million) - at the low end of the pre-sale estimated price range.

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