Lot 95. A 7.03 carats Kashmir cushion-shaped sapphire and diamond ring. Estimate CHF650,000 – CHF750,000 ($685,412 - $790,860). Photo Christie's Image Ltd 2016

Set with a cushion-shaped sapphire, weighing approximately 7.03 carats, within a circular-cut diamond surround, ring size 6, mounted in platinum

Accompanied by report no. 15097269 dated 20 September 2015 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. 81766 dated 2 September 2015 from the SSEF Swiss Gemmological Institute stating that the origin of the sapphire is Kashmir, with no indications of heating, and an Appendix letter indicating that 'this natural sapphire possesses extraordinary characteristics and merits special mention and appreciation'.

Report no. CS84608 dated 8 July 2015 from the AGL American Gemological Laboratories stating that the origin of the sapphire is Kashmir, with no indications of heating, and an Appendix letter indicating that 'the unique set of quality factors complements the rarity and desirability of this fine gem'.

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