18 Karat White Gold, Color Change Sapphire and Diamond Ring - Sotheby's

Centered by a cushion-cut color change sapphire weighing 13.02 carats, flanked by two modified trapeze-cut diamonds, size 7½; color change illustrated above. Estimation: 45,000 - 55,000 USD 

Accompanied by GIA report no. 5151067922 stating that the sapphire is of Sri Lankan origin, with no indications of heating.

Sotheby's. Magnificent Jewels. New York | 17 avr. 2013 - www.sothebys.com