Sotheby's, Geneva, May 2005 Lot 211 Sapphire and Diamond Ring 
Set with a cushion-shaped sapphire stated to weigh 11.79 carats within a surround of brilliant-cut diamonds, mounted in platinum, size 54.
Accompanied by GRS report no. GRS2004-020093T, stating the sapphire is of Burmese origin, with no indication of thermal treatment.
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