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The wife and husband team of Nancy and David Stone have long been recognized as pioneers of modern jewelry design since launching Nancy and David in 1980.

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75 Carat Briolette Diamond Necklace Sells for Record $11.1 Million

Nancy and David

Courtesy of Christies

Sold at the Christies Hong Kong Magnificent Jewels sale, this 75.36 carat briolette diamond pendant necklace sold for a record $11,145,734. Originally valued at $8.5 million to $12.5 million, the D Color, Internally Flawless Clarity, Type IIa diamond was the biggest diamond ever to appear at auction.

The entire Magnificent Jewels sale netted $82,947,664.