A diamond, ruby, emerald and enamel "Capricorn Ram" bangle bracelet, by David Webb. Photo Christie's Image Ltd 2014

The articulated hinged bangle designed as a green enamel ram with sculpted 18k gold spiraled horns and spots, bezel-set with cabochon ruby eyes and forehead, his face decorated with circular-cut diamonds, his green enamel body forming the hoop, to the sculpted gold tail, set with circular-cut diamonds and a cabochon emerald, mounted in 18k gold and platinum, 2¼ ins. diameter, in a David Webb brown suede pouch. Signed David Webb. Estimate $20,000 – $30,000

Christie's. MAGNIFICENT JEWELS, 16 April 2014, New York, Rockefeller Plaza - www.christies.com