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

Designed as a black enamel double frog, decorated with applied gold spots, enhanced by pavé-set circular-cut diamond eyes and mouth, its back legs forming a twist, joined by a cabochon ruby clasp, mounted in 18K yellow gold and platinum, diameter 2 inches.  Signed 'WEBB' for David Webb. ESTIMATE $28,000-35,000 

Philips de Pury & Company. 19 April 2012 4pm. 450 Park Avenue, New York. Enquiries Nazgol Jahan njahan@phillipsdepury.com - + 1 212 940 1283