Lot 233. A 12.54 carats Kashmir cushion-shaped sapphire ring. Estimate 979,000 — 1,470,000 CHF. Photo Sotheby's

Set with a cushion-shaped sapphire weighing 12.54 carats, size 53. 

Accompanied by SSEF report no. 82606 and Gübelin report no. 16100043, each stating that the sapphire is of Kashmir origin, with no indications of heating.  

Sotheby's. Magnificent Jewels and Noble Jewels, Genève, 16 nov. 2016, 10:30 AM