Lot 1792. 10.05 carats,  D colour, Internally Flawless clarity Type IIa diamond ring, mounted by Cartier. Estimate 13,500,000 — 16,000,000 HKD. Lot sold 15,220,000 HKD. Photo Sotheby's 2011

Centring on an old European-cut diamond weighing 10.05 carats, flanked on each side by an emerald-cut diamond together weighing approximately 2.00 carats, mounted in platinum, signed. 

Accompanied by GIA report numbered 2125341822, dated 12 November 2010, stating that the 10.05 carat diamond is D colour, Internally Flawless clarity; also accompanied by diamond type classification report stating that the diamond is determined to be a Type IIa diamond. Type IIa diamonds are the most chemically pure type of diamond and often have exceptional optical transparency. Further accompanied by Gübelin report numbered 1010286, dated 2 November 2010, stating that the 10.05 carat diamond is D colour, Internally Flawless clarity; also accompanied by an appendix stating that the diamond is a Type IIa diamond.

Sotheby's. Jewels and Jadeite, Hong Kong, 06 Apr 2011.