6 septembre 2015
A Belle Époque diamond single-stone ring, circa 1910
A Belle Époque diamond single-stone ring, circa 1910. Estimate £30,000 - 50,000 ' €41,000 - 68,000) . Photo: Bonhams. The old hexagonal-cut diamond, weighing 8.18 carats, within a delicatedly pierced platinum mount millegrain-set with old brilliant and...