Christie's, Hong Kong, May 2007

Lot 2103 A Sapphire and Diamond Ring

Set with a cushion-shaped sapphire weighing 20.28 carats within a brilliant-cut diamond surround, mounted in platinum, ring size 6

With report no. GRS2005-101175 dated 14 October 2005 from the GemResearch SwissLab stating that the sapphire is enhanced by heat with no residues present (GRS type royal blue)