12 décembre 2015
Platinum, Sapphire and Diamond Ring, Black Starr & Frost
![Platinum, Sapphire and Diamond Ring, Black Starr & Frost](https://image.canalblog.com/AltGI9DaX3Cr2Qw0kFzaB4vVXB0=/120x120/smart/filters:no_upscale()/http%3A%2F%2Fstorage.canalblog.com%2F74%2F82%2F119589%2F108015088_o.jpg)
Lot 509. Platinum, 13.76 carats Sapphire and Diamond Ring, circa 1925, Black Starr & Frost. Estimate 300,000 — 500,000 USD. Lot sold 394,000 USD. Photo Sotheby's Set with an emerald-cut sapphire weighing 13.76 carats, the mounting decorated with round...