细节
A DIAMOND RING
Set with a brilliant-cut diamond weighing 11.25 carats, mounted in platinum, ring size 5¾
Accompanied by report no. 2125472378 dated 9 August 2010 from the Gemological Institute of America stating that the 11.25 carat diamond is D colour, internally flawless clarity; also accompanied by a supplemental letter from the Gemological Institute of America stating the 11.25 carat diamond has been determined to be a 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
Also accompanied by report no. 1009244 dated 4 October 2010 from the Gübelin Gemmological Laboratory stating that the 11.25 carat diamond is D colour, internally flawless clarity; also accompanied by a note and appendix stating that based on its infrared spectrum, the 11.25 carat diamond is classified as a Type IIa. Additionally this 11.25 carat diamond possesses an antique cutting style which is rarely encountered in the gem trade today. It displays a colour and degree of transparency which are particular to the unique gemstones of Type IIa. Diamonds of this type, exhibiting an antique cutting style as well as a fine quality, are very rare and will most certainly evoke references to the historic term of 'Golconda'