A superb 19.94 carats Kashmir cushion-cut sapphire

A superb 19.94 carats Kashmir cushion-cut sapphire. Photo: Christie's Images Ltd., 2010

The unmounted cushion-cut sapphire weighing 19.94 carats

Accompanied by report no. 1008001 dated 3 August 2010 from the Gübelin GemLab stating that the sapphire is of Kashmir origin, with no indications of heating.

Report no. CS42413 dated 17 June 2010 from the AGL American Gemological Laboratories stating that the sapphire is of Kashmir origin, with no indications of clarity or heat enhancement

Report no.93005412 dated 10 March 2009 from the AGTA Gemological Testing Center stating that the sapphire is of Kashmir origin, with no indications of heating

Christie's. Jewels: The Geneva Sale, 17 November 2010. Geneva www.christies.com