Platinum, sapphire and diamond ring. Photo Sotheby's

The cushion-shaped sapphire weighing 6.08 carats, flanked by old European-cut diamonds weighing approximately 1.40 carats, size 7¼. Estimate 400,000-600,000 USD.

Accompanied by Gübelin report no. 11060014 stating that the sapphire is of Kashmir origin, no indications of heating.

Sotheby's. Magnificent Jewels. New York | 07 Dec 2011 www.sothebys.com