Diamond ring. Photo: Sotheby's.

Centring on an old-cut oval diamond weighing 8.02 carats, to shoulder set with brilliant-cut diamonds, mounted in platinum. Ring size: 5½. Estimation 7,000,000 — 8,000,000 HKD (677,154 - 773,890 EUR) 

Accompanied by GIA report numbered 1152509120, dated 8 July 2013, stating that the 8.02 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.

Sotheby's. Magnificent Jewels and Jadeite. Hong Kong | 07 oct. 2013 - http://www.sothebys.com