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Enamel and diamond frog brooch, David Webb

The stylized frog decorated with translucent green enamel, the mouth set with a line of small round diamonds, accented with 2 cabochon ruby eyes, the limbs of highly textured gold , mounted in 18 karat gold and platinum, signed Webb. Est. 5,000—8,000 USD

Sotheby's. Magnificent Jewels. 23 Apr 09. New York www.sothebys.com Photo courtesy Sotheby's