Platinum, sapphire and diamond ring, Bulgari. Photo Sothebys.

The oval-shaped sapphire weighing 12.45 carats, flanked by two half-moon shaped diamonds weighing approximately 1.00 carat, further set with round diamonds weighing approximately 4.00 carats, size 6½, signed Bulgari. Estimation 35,000 — 45,000 USD. Lot. Vendu 75,000 USD

Accompanied by SSEF report no. 67534 stating that the sapphire is of Burmese origin, with no indications of heating.

Sotheby's. Magnificent Jewels. New York | 11 déc. 2013 www.sothebys.com