Important sapphire and diamond ring. Photo: Sotheby's.

Set at the centre with a cabochon sapphire weighing 58.56 carats, between triangular diamond shoulders, size 53½. Estimation 730,000-1,275,000 CHF. Lot 666 vendu: 1,314,500 CHF

Accompanied by Gübelin report no. 11040059, stating that the sapphire is of Burmese origin, with no indications of heating.

Sotheby's. A Superb Private Collection of Gems and Jewels. Genève | 15 mai 2012 www.sothebys.com