細節
A DIAMOND RING, BY CARTIER
Set with a marquise-cut diamond weighing approximately 8.64 carats, to the single and old European-cut diamond openwork gallery and shoulders, mounted in platinum, ring size 5¾
Signed Cartier, No. HN447
Accompanied by report no. 2155655245 dated 6 September 2013 from the Gemological Institute of America stating that the 8.64 carat diamond is D colour, internally flawless clarity
Also accompanied by a supplemental letter from the Gemological Institute of America stating the 8.64 carat diamond has been determined to be type IIa. 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