18 karat two-color gold, ruby and diamond ring, Buccellati. Photo Sotheby's

Of openwork design, centered by an oval-shaped ruby weighing approximately 1.50 carats, flanked by two old mine-cut diamonds weighing approximately 1.05 and .95 carat, the mounting further set with round diamonds weighing approximately .45 carat, size 7, signed M. Buccellati Italy. Estimation 10,000 — 15,000 USD. Lot. Vendu 10,000 USD

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