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Solitaire old mine diamond engagement ring. Set to centre with a cushion shape old mine diamond, J colour, VS2 clarity, with an approximate weight of 2.84 carats in an open back claw setting, to an elegant oval collet with intricately pierced details, curved claws and open backholing, flanked by slightly trumpeting shoulders flowing into a solid D-shape shank. Marked platinum, circa 1905, accompanied by Gemological Institute of America report #2185767199.