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Antique diamond coronet cluster ring. Centrally set with a round old cut diamond, H colour, SI1 clarity, with a weight of 2.17 carats in an open back claw setting, surrounded by a single row of fourteen round old cut diamonds in open back grain and rubover settings with a combined weight of 1.40 carats. The total approximate diamond weight is 1.40 carats, to a openwork coronet cluster featuring millegrain decoration, scalloped edging, intricately pierced gallery and circular backholing, the inwardly tapering shoulders curve to a solid squared shank. Marked 18 carat yellow gold with platinum settings, English, circa 1910, accompanied by HRD Antwerp report #170003030790.