A pair of superb Type IIa diamond ear pendants, by Harry Winston. Estimate $1,500,000 – $2,000,000. Photo Christie's Image Ltd 2015

Each suspending a detachable pear-shaped diamond, weighing approximately 10.06 and 10.02 carats, to the variously-cut diamond cluster surmount, mounted in platinum, with maker's mark, in a Harry Winston navy leather pouch. With maker's mark for Harry Winston

With report 2135419756 dated 3 June 2011 from the Gemological Institute of America stating that the diamond, weighing approximately 10.06 carats, is D color, VS1 clarity

With report 1132417908 dated 10 June 2011 from the Gemological Institute of America stating that the diamond, weighing approximately 10.02 carats, is D color, VVS2 clarity  

Accompanied by supplemental letters from the Gemological Institute of America stating that the diamonds have been determined to be Type IIa diamonds. 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, 14 April 2015, New York, Rockefeller Plaza