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Solitaire old mine diamond ring. Set to centre with a cushion shape old mine diamond with a weight of 1.20 carats in an open back claw setting, flanked by six round old single cut diamonds in open back grain settings with a combined weight of 0.06 carats. The total approximate diamond weight is 1.26 carats, with an intricate openwork collet and pierced backholing, to elegant inward tapered gently sloping shoulders and a solid D-shape shank. Tested platinum, circa 1910.