Very fine sapphire and  diamond ring. Photo Sotheby's

Centring on a step-cut sapphire weighing 8.65 carats, flanked on each side by an emeraldcut diamond weighing 0.55 and 0.53 carat, mounted in platinum. ESTIMATE 5,500,000-6,300,000 HKD

NOTE: Ring size: 5¾

Accompanied by Gübelin and AGL reports numbered 1005560 and CS42140 respectively, stating that the 8.65 carat sapphire is natural, of Kashmir origin, with no indications of heating. Sapphires which have not been heated are scarce. Also accompanied by GIA reports numbered 5111426489 and 5111426492, dated 22 August 2011, stating that the 0.55 and 0.53 carat diamonds are both E colour, VS1 clarity.

Sotheby's. Magnificent Jewels and Jadeite. Hong Kong | 03 Apr 2012 www.sothebys.com