Lot 1782. Fine Unmounted 12.36 carats,  D Colour, Flawless Type IIa  Diamond. Estimate 9,800,000 — 12,000,000 HKD. Photo: Sotheby's.

Set with marquise- and pear-shaped diamonds weighing 46.79 carats in total, mounted in platinum, length approximately 150mm.

Accompanied by a GIA report numbered 5171492749, dated 12 May 2016, stating that the 12.36 carat diamond is D Colour, Flawless, with Excellent Polish and Symmetry; 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.