8 avril 2017
Platinum, Diamond and Sapphire Ring, France
Lot 251. Platinum, 10.27 carats Type IIa Diamond and Sapphire Ring, France, circa 1920. Estimate 400,000 — 600,000 USD . Photo: Sotheby's. Centering an emerald-cut diamond weighing 10.27 carats, flanked by six baguette sapphires, size 6, with French assay...