Best of the Best 2011: Diamonds: Sotheby’s Diamonds

James de Givenchy, designer for Sotheby’s Diamonds (212.894.1400, www.sothebysdiamonds.com), fashions avant-?garde jewelry using some of the world’s best diamonds. This year he continues to captivate an international flock of collectors with pieces such as a striking ring with a vivid yellow emerald-cut diamond that is set on a slant so that it appears to be floating above the wearer’s hand.

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