Yellow sapphire and diamond ring. Photo Sotheby's.

The cushion-shaped yellow sapphire weighing 30.94 carats, set between triangular diamonds, size 531/2, British hallmarks. Estimation 14,000 — 23,000 CHF

Accompanied by SSEF report no. 72259, stating that the yellow sapphire is of Ceylon origin, with no indications of heating.

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