The Eye of Golconda. A superb diamond and emerald pendent necklace. Photo Christie's Image Ltd 2014
Set with a pear-shaped diamond weighing 40.05 carats, to the old mine-cut diamond surmount weighing 6.76 carats, spaced by an octagonal-shaped emerald weighing 0.87 carat and diamond beads, suspended from a double-strand neckchain designed as a series of emerald roundels flanked by diamond beads, mounted in 18k white gold, 43.0 cm (length adjustable). Estimate HK$66,500,000 – HK$80,000,000 ($8,619,517 - $10,369,344)
Accompanied by two reports nos. 1152940306 and 2155979599 dated 19 February 2014 and 12 March 2014 from the Gemological Institute of America stating that the 40.05 and 6.76 carat diamonds are D colour, internally flawless clarity; also accompanied by two supplemental letters from the Gemological Institute of America stating the 40.05 and 6.76 carat diamonds have 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 I and the 105.60 carat Koh-i-noor, are examples of Type IIa
Also accompanied by two reports nos. 14020091 and 14020187 dated 12 February 2014 and 28 February 2014 from the Gübelin Gemmological Laboratory stating that the 40.05 and 6.76 carat diamonds are D colour, internally flawless clarity and Type IIa; also accompanied by two appendixes stating that the type IIa diamonds of 40.05 and 6.76 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"
Report no. 12111031 dated 22 November 2012 from the Gübelin Gemmological Laboratory stating that the 0.87 carat emerald is of Colombia origin, with indications of minor clarity enhancement
Christie's. HONG KONG MAGNIFICENT JEWELS, 27 May 2014, Convention Hall. http://www.christies.com/