1 mai 2017
Sapphire and diamond ring, circa 1930
Lot 232. 17.39 carats Burmese 'royal blue' sugarloaf sapphire and diamond ring, circa 1930. Estimate 305,000 — 510,000 CHF . Photo: Sotheby's Set with a sugarloaf sapphire weighing 17.39 carats, the mount accented with single-cut and rose diamonds, size...