David Webb.. An Enamel, Ruby and Diamond Frog Bracelet. Photo Philips de Pury & Company

Designed as a green enamel frog, decorated with applied gold spots, enhanced by cabochon ruby eyes and a pavé-set diamond mouth, its back legs forming a twist, joined by a cabochon ruby clasp, mounted in 18K yellow gold and platinum, length 6 inches.  Signed 'Webb' for David Webb. STIMATE $20,000-30,000. SOLD AT $27,500

Philips de Pury & Company. Jewels. New York. 6 december 2011 www.phillipsdepury.com