Emerald and diamond ring. Photo courtesy Tiancheng International Auctioneer Limited

Centring on a sugar-loaf cabochon emerald weighing 26.04 carats, decorated with brilliant-cut diamonds extending to half shank. Diamonds together weighing approximately 2.20 carats. Mounted in platinum. Ring size: 6 1/4. Estimate US$130,000 - 170,000

Accompanied by Gübelin report numbered 12021011 dated 10 February 2012 and SSEF report numbered 62183 dated 20 February 2012, stating that the 26.04 carat emerald is natural beryl, with no indication of clarity enhancement. 

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/