Platinum, sapphire and diamond ring. Photo courtesy Sotheby's

The cushion-cut sugarloaf cabochon sapphire weighing 27.46 carats, the mounting set with single-cut diamonds weighing approximately 1.15 carats, size 6¼. Estimation 275,000 — 375,000 USD

Accompanied by AGL report no. CS 51416 stating that the sapphire is of Burmese origin, with no indications of heating.

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