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Lot 293. A rare 22.72 carats, D color, Internally Flawless clarity Type IIa cushion modified brilliant-cut diamond ring, by Leviev. Estimate USD 2,000,000 - USD 3,000,000. Price Realised USD 2,647,500 © Christie's Images Ltd 2016.

Set with a cushion modified brilliant-cut diamond, weighing approximately 22.72 carats, flanked on either side by a tapered baguette-cut diamond, ring size 6 1/4, mounted in platinum. Signed Leviev

Accompanied by report no. 2135773312 dated 14 September 2011 from the GIA Gemological Institute of America stating that the diamond is D color, Internally Flawless clarity 

With a supplemental letter from the Gemological Institute of America stating that the diamond has been determined to be a Type IIa diamond. Type IIa diamonds are the most chemically pure type of diamond and often have exceptional optical transparency. Type IIa diamonds were first identified as originating from India (particularly from the Golconda region) but have since been recovered in all major diamond-producing regions of the world. Among famous gem diamonds, the 530.20 carat Cullinan I and the 105.60 carat Koh-i-noor, are examples of Type IIa

Christie's. Magnificent Jewels, 7 December 2016, New York, Rockefeller Plaza