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Solitaire old mine diamond ring. Set with a cushion shape old mine diamond, H colour, VS2 clarity, with an approximate weight of 3.00 carats in an open back claw setting, to a solitaire design with intricately pierced openwork gallery of repeating scroll motifs, open backholing, supported by slightly raised shoulders with delicate cheniers, leading to a flat solid tapered shank. Tested platinum, circa 1915, accompanied by HRD report #12031305002.