Lot 340. Fine 11.64 carats Kashmir 'royal blue' sapphire and diamond ring. Estimate 1,310,000 — 1,910,000 CHF. Photo: Sotheby's.

Set with a cushion-shaped sapphire weighing 11.64 carats, between triangular diamond shoulders, size 57, sizing band, maker's mark for Jacques Timey.  

Accompanied by SSEF report no. 90970 and Gübelin report no. 13080071, each stating that the sapphire is of Kashmir origin, with no indications of heating, 'royal blue' colour as stated in the SSEF report, together with an appendix letter.