Coloured diamond and diamond ring. Photo Sotheby's

Set with a step-cut diamond of yellowish-brown tint weighing 3.33 carats, within a surround of circular-cut and baguette diamonds, size H1/2. Estimate 10,000 — 15,000 GBP

Diamond untested for natural colour origin.

Sotheby's. FINE JEWELS. 26 MARCH 2014 | 10:00 AM GMT | LONDON - www.sothebys.com