Lot 397. From a noble family. Impressive 17.55 carats Kashmir sapphire and diamond ring, Chaumet, 1929. Estimate 580,000 — 865,000 CHF (530,071 - 790,537 EUR). Photo Sotheby's

Set with a cushion-shaped sapphire weighing 17.55 carats, between triangular diamond shoulders, size 48, unsigned.  

Accompanied by SSEF report no. 83210 and Gübelin report no. 16038115, each stating that the sapphire is of Kashmir origin, with no indications of heating, together with appendix letters. 

Also accompanied by a copy of the archives from Chaumet.  

Sotheby's. Magnificent Jewels and Noble Jewels, Genève, 17 mai 2016, 10:00 AM