A Magnificent Diamond Ring (44.09 carats). Photo: Christie's Images Ltd 2012

Set with a rectangular-cut diamond, weighing approximately 44.09 carats, flanked on either side by a tapered baguette-cut diamond, mounted in platinum. Estimate on request

With report 5141026166 dated 6 December 2011 from the Gemological Institute of America stating that the diamond is D color, internally flawless clarity, with excellent polish and excellent symmetry

Accompanied by a supplemental letter 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 and the 105.60 carat Koh-i-noor, are examples of Type IIa 

Christie's. Magnificent Jewels, 17 April 2012, New York, Rockefeller Plaza