18 karat gold and green enamel frog dress set, David Webb

Comprising a pair of cufflinks and four studs, each designed as a frog applied with translucent green enamel, the oval eyes of red enamel, signed Webb. Est. ,000—12,000 USD

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