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Auction sale reference

Unmounted Diamond | 28.88克拉 圓形 D色 全美無瑕 Type IIa 鑽石

Sold for HK$21,030,000 at Sotheby's on Apr 23, 2026.

Round brilliant-cut diamond shown against a white background.

Lot description

The brilliant-cut diamond weighing 28.88 carats. Accompanied by GIA report no. 2239353167, dated 17 February 2026, stating that the diamond is D colour, Flawless, Excellent Cut, Polish and Symmetry; Also accompanied by a diamond type classification letter 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.

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