Edwardian fire opal and diamond coronet cluster ring. Set to centre with a cushion shape old cut natural fire opal in an open back rubover setting with an approximate weight of 6.75 carats, further set with thirty six round old cut diamonds in open back grain settings with a combined approximate weight of 0.40 carats, all to an impressive coronet cluster featuring millegrain edging, a structured galley decorated with scrolling details and open backholing, leading to split shoulders with foliate motifs and flowing through to a solid shank. Tested platinum, circa 1915.
