Lot 1789. Important D Colour, Internally Flawless Type IIa Emerald-cut 17.05 carats Diamond Ring, CartierEstimate 12,000,000 — 20,000,000 HKD (1,467,561 - 2,445,935 EUR). Photo: Sotheby's.

 Set with an emerald-cut diamond weighing 17.05 carats, mounted in platinum, signed Cartier and numbered. Ring size: 5, case stamped Cartier

Accompanied by GIA report numbered 10885925, dated 19 July 2016, stating that the 17.05 carat diamond is D Colour, Internally Flawless / Improvable; further accompanied by diamond type classification report stating that the diamond is determined to be a Type IIa diamond. Type IIa diamonds are the most chemically pure type of diamond and often have exceptional optical transparency. Also accompanied by GIA report, dated 3 December 1999, stating that the diamond is D Colour, Flawless.

Sotheby's. Magnificent Jewels and Jadeite, Hong Kong, 04 Apr 2017, 02:30 PM