Edwardian diamond three stone ring. Set with three cushion shape old mine diamonds in open back claw settings with a combined approximate weight of 1.60 carats, to an elegant three stone design featuring curving split claws, an intricately pierced gallery and round open backholing, leading to inwardly tapering shoulders with chenier detail and flowing through to a solid D-shape shank. Marked 18 carat yellow gold and platinum, circa 1910