Elegant Platinum and 10.19 carats Type lla Diamond,  D color, Internally Flawless, Ring. Estimate 1,300,000 — 1,600,000 USD. Photo: Sotheby's.

Set with a cushion-cut diamond weighing 10.19 carats, the mounting accented by small round diamonds weighing .27 carat, size 6½.

Accompanied by GIA report no. 2175071992 stating that the diamond is D color, Internally Flawless. Together with a letter from the GIA stating that the diamond has been determined to be Type lla.

Sotheby's. Important Jewels, New York, 24 Sep 2015