SAPPHIRE AND DIAMOND RING, CIRCA 1915-20The old cushion-shaped sapphire, weighing 13.81 carats, within an engraved and pierced platinum mount with foliate detail, millegrain-set with old brilliant and single-cut diamonds,ring size MFor further information on this lot please visit theProvenance: Apanied by a report from SSEF stating that the sapphire is of Sri Lankan origin, with no indications of heat treatment. Report number 124020, dated 10th August 2022.