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Diamond cluster ring by Kohn. Set to centre with a row of four round old cut diamonds in open back grain settings, surrounded by twenty four round old cut diamonds in open back grain settings. The total approximate diamond weight is 1.20 carats, to an angular openwork cluster featuring millegrain borders, an intricately pierced gallery and open backholing, leading to trumpeting shoulders with engraved detail to the sides and flowing through to a ridged shank. Tested platinum, Kohn & Co., American, circa 1915.