Diamond ring, 1920s. Photo Sotheby's.

The old mine brilliant-cut diamond weighing 11.21 carats, set between shoulders highlighted with single-cut diamonds, size 501/2. Estimation 450,000 — 715,000 CHF.

Accompanied by GIA report no. 2155749201, stating that the diamond is D Colour, VS1 Clarity.

FROM A NOBLE FAMILY

Sotheby's. Magnificent Jewels and Noble Jewels, Genève, 13 mai 2014 - http://www.sothebys.com/