Sotheby's, Geneva, November 1999

Lot 191 Sapphire and Diamond Ring, by Cartier

Claw-set with an cushion-shaped sapphire weighing 10.02 carats, within a double frame of pear-shaped and brilliant-cut diamonds, mounted in 18 karat white gold, size 54.

Accompanied by GRS report no. 9810017 stating that the sapphire is of Burmese origin, no indication of thermal treatment.