Platinum and Sapphire Ring - Photo Sotheby's

The cushion-cut sapphire weighing 10.08 carats, size 6¾. Estimation: 500,000 - 700,000 USD

Accompanied by two gemological reports:
AGL report no. CS 81366 stating the sapphire is of Kashmir origin, with no indication of heating.
Gübelin report no. 0406002 staing the sapphire is of Kashmir origin, with no indication of heating.

Sotheby's. Magnificent Jewels. New York | 05 déc. 2012 www.sothebys.com