Art Deco diamond cluster ring. Set to centre with a round old cut diamond in an open back grain setting with an approximate weight of 0.50 carats, surrounded by sixteen round old cut diamonds in open back grain settings with a combined weight of 0.75 carats. The total approximate diamond weight is 1.25 carats, to a stylish rectangular cluster with truncated edges featuring a raised diamond shape collet to the centre, surrounded by intricately pierced openwork, decorative engraving, supported by a linear gallery and shaped backholing, flanked to either side with trumpeting champfered shoulders which lead to a solid shank. Marked platinum and iridium, American, circa 1920.
