Art Deco diamond and onyx cluster ring, circa 1925.
Art Deco diamond and onyx cluster ring. Set to centre with thirty nine round old cut diamonds in open back grain settings with a combined approximate weight of 1.00 carats, further set with twelve round rose cut diamonds in open back grain settings with a combined weight of 0.12 carats. The total approximate diamond weight is 1.12 carats, to a domed bombé form with an oval onyx mount featuring curving claws, millegrain edging and round open backholing, leading to split shoulders with chenier detail and flowing through to a solid D-shape shank. Tested platinum, circa 1925.