Emerald-cut diamond ring, Graff

Diamond ring, Graff. photo courtesy Sotheby's  

Centring on an emerald-cut diamond weighing 11.32 carats, between tapered baguette diamond shoulders, mounted in platinum, size 51, signed Graff. Est. 500,000—700,000 CHF. Lot Sold 758,500 CHF

Accompanied by GIA report no. 10465897 stating that the diamond is D Colour, VS1 Clarity.

Sotheby's. Magnificent Jewels, 16 Nov 10, Geneva www.sothebys.com