18.03 carats Type IIa diamond Light Brown Diamond and Diamond Ring. Estimate 1,200,000 — 1,500,000 HKD (135,190 - 168,987 EUR). Photo Sotheby's

Set with an emerald-cut light brown diamond weighing 18.03 carats, surrounded by emerald-cut diamonds together weighing approximately 1.50 carats, mounted in platinum. Ring size: 9¼

Accompanied by GIA report numbered 2184678710, dated 5 December 2014, stating that the 18.03 carat diamond is natural, Y to Z colour, VVS2 clarity; also accompanied by diamond type classification reports 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.

Sotheby's. Magnificent Jewels & Jadeite, Hong Kong, 06 avr. 2015, 01:00 PM