Lot 66. A 5.41 carats Kashmir cushion-shaped sapphire and diamond ring. Estimate CHF425,000 – CHF625,000 ($438,690 - $645,132). Photo Christie's Image Ltd 2016.

Set with a cushion-shaped sapphire, weighing approximately 5.41 carats, between half-moon-shaped diamond shoulders, to the diamond-set hoop, ring size 6, mounted in platinum

Accompanied by report no. 16030178 dated 1 April 2016 from the Gübelin GemLab stating that the origin of the sapphire is Kashmir, with no indications of heating, and an Information Sheet on 'Unheated sapphires'.

Report no. CS1073912 dated 4 March 2016 from the AGL American Gemological Laboratories stating that the origin of the sapphire is Kashmir, with no indications of heating.

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