Lot 350 – A Magnificent 81.38, 15.30 and 7.04 Diamond Pendant Necklace. Estimate USD 2,800,000 - USD 3,500,000. Price realised USD 3,189,000. © Christie's Images Ltd 2015

Suspending a detachable pendant, set with three rectangular-cut diamonds, weighing approximately 81.38, 15.30 and 7.04 carats, spaced by circular-cut diamonds, to the neckchain designed as a line of seventeen circular-cut diamonds, the largest weighing approximately 15.46 carats, spaced by rectangular and square-cut diamonds, mounted in 18k white gold, 18 ins.

With report 5161298875 dated 25 June 2014 from the Gemological Institute of America stating that the rectangular-cut diamond, weighing approximately 81.38 carats, is K, Faint Brown color, VVS1 clarity; accompanied by a working diagram indicating that the clarity of the diamond may be potentially Internally Flawless.

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 and the 105.60 carat Koh-i-noor, are examples of Type IIa .