Lot 2033. A rare 9.06 carats D colour, internally flawless clarity Type IIa old mine-cut diamond ring. Estimate HK$8,000,000 – HK$12,000,000 (US$1,000,000-1,500,000). Photo Christie's Image Ltd 2016.

Set with an old mine-cut diamond, weighing approximately 9.06 carats, mounted in gold, ring size 5¼

Accompanied by report no. 2165872148 dated 11 December 2014 from the GIA Gemological Institute of America stating that the diamond is D colour, internally flawless clarity; and a Diamond Type Classification letter stating that the diamond has been determined to be Type IIa 

Report no. 14120156 dated 17 December 2014 from the Gübelin GemLab stating that the diamond is D colour, internally flawless clarity and Type IIa; also accompanied by an appendix stating that the type IIa diamond of 9.06 ct display an antique cutting style as well as a superior quality in purity of colour and transparency unique to the finest of type IIa diamonds. Diamonds of this kind, seldom encountered in the gem trade today, are extremely rare and comparable to those famous and exquisite diamonds which originated from the kingdom of “Golconda” 

Christie's. HONG KONG MAGNIFICENT JEWELS, 31 May 2016, Convention Hall