A 7.20 carats Kashmir sapphire and diamond ring. Estimate CHF275,000 – CHF325,000 ($298,770 - $353,092). Photo Christie's Image Ltd 2015.

Set with a cushion-shaped sapphire, weighing approximately 7.20 carats, within two round-cornered rectangular-cut diamonds, weighing approximately 1.69 and 1.68 carats, to the tapered baguette-cut diamond shoulders, mounted in platinum, ring size 6¼ 

Accompanied by report no. 13105335 dated 26 October 2013 from the Gubelin GemLab Institute stating that the sapphire is of Kashmir origin, with no indications of heating 

Report no. CS 82954 dated 1 October 2013 from the AGL American Gemological Laboratories stating that the sapphire is of Kashmir origin, with no indications of heating, and a letter stating that the sapphire '.. is one of these exceptional gems, possessing outstanding examples of pargasite, tourmaline and zircon inclusions which irrefutably confirm the gem's origin' 

Christie's. MAGNIFICENT JEWELS, 13 May 2015, Geneva