Lot 403. Fine 24.56 carats Ceylon sapphire and diamond ring, Louis Gérard. Estimate 95,000 — 140,000 CHF. Lot sold 278,500 CHF. Photo: Sotheby's 2012

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.

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

Sotheby's. Magnificent Jewels, Geneva, 14 Nov 2012