Christie's, Hong Kong, November 2007 Lot 2348 A Ruby and Diamond Ring 
Centering upon a cushion-shaped ruby weighing approximately 5.03 carats, within a pear-shaped diamond and circular-cut ruby sunburst surround, mounted in platinum, ring size 6
With report no. GRS2006-021024 dated 20 February 2006 from the Gem Research Swiss Lab stating that the 5.03 carat ruby is of Burma origin with no indication of thermal treatment
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