Sapphire, ruby and diamond ring, David Webb. Photo Sotheby's.

Featuring a cabochon sapphire flanked by circular-cut rubies, framed with brilliant-cut diamonds and pear-shaped rubies, size 57, signed Webb. Estimation 45,000 — 72,000 CHF

Accompanied by SSEF report no. 72246, stating that the sapphire is of Burmese origin, with no indications of heating.

Sotheby's. Magnificent Jewels and Noble Jewels, Genève, 13 mai 2014 - http://www.sothebys.com/