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18 karat gold, ruby and diamond bird brooch, Cartier, France, circa 1950. photo Sotheby's

Round diamonds weighing approximately 3.00 carats, signed Cartier, France, numbered 30904. Est. 20,000—30,000 USD - Hammer Price with Buyer's Premium:  34,375 USD

Sotheby's. Magnificent Jewels. 09 Dec 09. New York www.sothebys.com