Sapphire and diamond pendant. Photo courtesy Sotheby's

Claw-set with an oval sapphire weighing 15.32 carats, within a frame of brilliant-cut diamonds, the surmount set with French-cut and heart-shaped stones. Estimate 19,000 — 29,000 CHF

Accompanied by SSEF report no. 69959, stating that the sapphire is of Ceylon origin, with no indications of heating.