Christie's. Magnificent Jewels & the Rockefeller Emerald, 20 June 2017, New York, Rockefeller Center
An important 16.11 carats D color, Flawless clarity Type IIa round brilliant-cut diamond
Lot 252. An important 16.11 carats D color, Flawless clarity Type IIa round brilliant-cut diamond. Estimate USD 1,600,000 - USD 2,200,000. Price realised USD 1,927,500. © Christie's Images Ltd 2017
The round brilliant-cut diamond, weighing approximately 16.11 carats.
Accompanied by report no. 2171713701 dated 6 July 2016 from the GIA Gemological Institute of America stating that the diamond is D color, Flawless clarity, with excellent cut, polish and symmetry
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.