Lot 1604. Orange-yellow Diamond, Diamond and Emerald Ring, Harry Winston. Estimate 320,000 — 480,000 HKD. Photo: Sotheby's.

Centring a step-cut diamond of orange-yellow tint weighing approximately 2.65 carats, to the surround set with tapered baguette emeralds and diamonds, flanked by two tapered baguette diamonds, signed Winston, with maker's mark for Jacques Timey. Ring size: 4¼, case stamped Harry Winston.

The coloured diamond has not been tested for natural colour origin.