Lot 470. 31.52 carats Kashmir step-cut sapphire ring, Fontana. Estimation 195,000 — 295,000 CHF. Lot sold 2,110,000 CHF. Photo Sotheby's.
Claw-set with a step-cut sapphire weighing 31.52 carats, size 54, signed Fontana, French assay mark.
Accompanied by SSEF report no. 78987 and Gübelin report no. 15030111, each stating that the sapphire is of Kashmir origin, with no indications of heating.