Lot 1715. An Impressive 20.01 carats D Colour, VVS1 Clarity, Type IIa Diamond Ring. Estimate 11,000,000 — 16,000,000 HKD (1,401,400 — 2,038,400 USD). Lot Sold 13,375,000 HKD (1,706,115 USD). Courtesy Sotheby's.

Set with a pear-shaped diamond weighing 20.01 carats, embellished with brilliant-cut diamonds and diamonds of pink tint, size 7¾.

Accompanied by GIA report no. 12362315, dated 21 August 2018, stating that the diamond is D Colour, VVS1 Clarity, with Excellent Polish and Symmetry; further accompanied by diamond type classification report stating that the diamond is determined to be Type IIa diamond. Type IIa diamonds are the most chemically pure type of diamond and often have exceptional optical transparency. Together with the original working diagram stating that the diamond may be potentially Internally Flawless.