Lot 1724. 4.36 carats D Colour, Internally Flawless Emerald-cut Diamond Ring, Harry Winston. Estimate 1,600,000 — 1,900,000 HKD. Photo: Sotheby's.

Set with an emerald-cut diamond weighing 4.36 carats, flanked on each side by a tapered baguette diamond, mounted in platinum, signed Winston. Ring size: 6¾

Accompanied by GIA report numbered 5171767164, dated 28 July 2016, stating that the 4.36 carat diamond is D Colour, Internally Flawless.

Sotheby's. Important Jewels and Jadeite Hong Kong, 28 Nov 2016, 01:00 PM