Sotheby's, Hong Kong, April 1999 Lot 631 Important Sapphire And Diamond Ring 
Comprising a singe large cut-cornered sapphire weighing 22.94 carats, flanked by 2 trilliant-cut diamonds weighing approximately 1.20 carats, mounted in 18 karat white gold, size 6.
Accompanied by GRS Gemresearch Swisslab report number 9808035 stating that the sapphire is of Sri Lankan origin with no indication of thermal treatment.
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