South Sea Baroque Pearl 'Dragon' Ring, by Buzzanca. Photo courtesy Tiancheng International Auctioneer Limited

Modelled as a dragon head, set with a baroque-shaped South Sea cultured pearl, to a diamond-set nose, eyebrows and manes, accented by blue sapphire set eyes, the shank set as the forepaws holding one round South Sea cultured pearl. Cultured pearls measuring approximately 16.70 to 12.00mm. Diamonds together weighing approximately 4.50 carats. Mounted in 18 karat white gold. Ring size: 6 3/4. Signed B for Buzzanca. Estimate US$16,000 - 21,000

Tiancheng International Auctioneer Limited. SPRING AUCTION 2013 JEWELLERY AND JADEITE. 15 Jun · 3 pm. Hong Kong Headquarters 30/F Bank of China Tower 1 Garden Road, Central Hong Kong http://www.tianchengauction.com/