Lot 219. A 9.29 carats cushion-shaped Kashmir sapphire and diamond ring, by Boucheron. Estimate CHF500,000 – CHF700,000 ($516,106 - $722,548). Photo Christie's Image Ltd 2016.

Set with a cushion-shaped sapphire, weighing approximately 9.29 carats, between baguette-cut diamond tapered shoulders, ring size 5, with French assay marks for platinum. Signed Boucheron Paris

Accompanied by report no. 83110 dated 26 November 2015 from the SSEF Swiss Gemmological Institute stating that the origin of the sapphire is Kashmir, with no indications of heating.

Report no. CS80765 dated 27 September 2010 from the AGL American Gemological Laboratories stating that the origin of the sapphire is Kashmir, with no gemological evidence of heat and no clarity enhancement, and a 'Jewel Folio'.

Christie's. GENEVA MAGNIFICENT JEWELS, 18 May 2016, Geneva