A Diamond Pendant Necklace Weighing Approximately 50.52 Carats. Christie's image Ltd 2012

Suspending a pear-shaped diamond, weighing approximately 50.52 carats, from a circular-cut diamond, weighing approximately 2.28 carats, to the fine link neckchain, mounted in platinum, 17½ ins. Estimate on request.

With report 5131799881 dated 13 September 2011 from the Gemological Institute of America stating that the diamond is D color, flawless clarity, with excellent polish and excellent symmetry

Accompanied by 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

With report 2145091600 dated 5 December 2011 from the Gemological Institute of America stating that the circular-cut diamond is D color, internally flawless clarity, with excellent polish and excellent symmetry (2)

Christie's. Magnificent Jewels. 16 October 2012. New York, Rockefeller Plaza