Lot 1816. An Impressive Pair of Unmounted 11.28 and 11.24 carats Type IIa Diamonds. Estimate 21,500,000 — 28,000,000 HKD (2,743,185 - 3,572,520 USD). 

Each brilliant-cut diamond weighing 11.28 and 11.24 carats respectively.

Accompanied by two GIA reports no. 2195254155, dated 26 December 2018 and no. 2201201166, dated 14 June 2019, stating that the diamonds are both D Colour, Flawless, Excellent Cut, Polish and Symmetry; further accompanied by two diamond type classification reports stating that both diamonds are determined to be Type IIa. Type IIa diamonds are the most chemically pure type of diamond and often have exceptional optical transparency.

Sotheby's. Magnificent Jewels and Jadeite, Hong Kong, 07 Oct 2019