If you leave your details, we can arrange a viewing with you to tell you more about this item.
Golconda Type IIa diamond ring. Centrally set with a cushion shape old mine Golconda Type IIa diamond, E colour, SI1 clarity with a weight of 3.58 carats in an open back claw setting, flanked by eight round old cut diamonds in open back grain settings with a combined weight of 0.08 carats. The total approximate diamond weight is 3.66 carats, to an impressive solitaire design with curving claws, linear open gallery and intricately pierced backholing, flanked to either side with raised open shoulders which terminate to fine ribbed details before flowing to a solid D-shape shank. Tested platinum, circa 1905, accompanied by Gemological Institute of America report #2141498398.
Diamonds are classified by scientists into two main types, depending on the presence of nitrogen in the diamond's chemical makeup. Type II diamonds contain little to no such impurities. This type is further subdivided into two groups, ‘a’ and ‘b’, both of which make up less than two percent of all gem quality diamonds. Type IIa diamonds are extremely rare, and the most pure of all diamonds, and consequently exhibit superior transparency. This type was first identified as coming out of India, namely the Golconda region. Some of the most famous diamonds in the world are Type IIa, including the Koh-i-noor and the Cullinan I.
Although the Berganza showroom will be closed from November 5th, our website is still active and we remain open for virtual consultations and pre-booked collections. If you find a special piece during this time, our shipping team remains operational for both domestic and international shipments. All shipping is complimentary, gift wrapped and fully insured.
Should you wish to make an enquiry, please contact us on +44 (0)20 7404 2336 send an email to email@example.com, or get in touch with us via WhatsApp: +44(0)7494 076160 and one of our specialists would be delighted to assist.
The Team at Berganza