An important coloured diamond and diamond ring. Photo: Christie's Images Ltd. 2011

Set with a marquise-cut fancy blue diamond weighing 13.39 carats, flanked on either side by a tapered baguette-cut diamond, mounted in platinum, ring size 5. Estimate HK$27,000,000 - HK$35,000,000  ($3,484,283 - $4,516,663)

Accompanied by report no. 17217060 dated 16 May 2008 from the Gemological Institute of America stating that the 13.39 carat diamond is fancy blue, natural colour, VVS2 clarity

13.39克拉欖尖形彩藍色VVS2鑽石戒指，附GIA證書，配以小鑽，鑲鉑金，戒指尺寸5

Christie's. Hong Kong Magnificent Jewels, 31 May 2011, Convention Hall  www.christies.com