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Platinum, Sapphire And Diamond Ring. Photo Sotheby's

Centered by a cushion-shaped sapphire weighing 13.22 carats, flanked by two triangular diamonds weighing approximately 1.80 carats, size 2¼. Estimation: 350,000 - 450,000 USD 

NOTE DE CATALOGUE: Accompanied by 2 gemological reports:
Gubelin report no. 12070015 stating that the sapphire is of Kashmir origin, no indication of heat.
AGL report no. CS 50100 stating that the sapphire is of Kashmir origin, no indication of heat.

Sotheby's. Important Jewels. New York | 20 sept. 2012 www.sothebys.com