Fine sapphire and diamond ring, Louis Gérard - Photo Sotheby's

Set with an oval sapphire weighing 24.56 carats, between shield-shaped diamond shoulders, size 49, sizing band, unsigned, French import and maker's marks. Estimation: 95,000 - 140,000 CHF - Lot. Vendu 278,500 CHF

Accompanied by SSEF report no. 65310, stating that the sapphire is of Ceylon origin, with no indications of heating.

Sotheby's. Magnificent Jewels. Genève | 14 nov. 2012 www.sothebys.com