A Fancy Intense Yellow Diamond Ring. Photo courtesy Tiancheng International

Centring on a fancy intense yellow rectangular modified brilliant - cut diamond weighing 12.50 carats, flanked on each side by a half moon - shaped diamond, mounted in platinum and 18k yellow gold. Ring size 6. Estimate HK$3,280,000 - 4,300,000  US$420,500 - 550,000

Accompanied by GIA report *2135413252, dated 09 May2011 stating that the 12.50 carat diamond is natural, fancy intense yellow colour, Internally Flawless clarity.

Tiancheng International. Hong Kong Autumn Auction 2011. 28 Nov 2011 www.tianchengauction.com