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Art Deco cushion shape old mine diamond ring. Set with a cushion shape old mine diamond in an open back grain set box collet setting with a weight of 2.00 carats, further set with sixteen round single cut diamonds in open back grain settings with a combined weight of 0.16 carats. The total approximate diamond weight is 2.16 carats, to a geometric pierced gallery with fancy backholing, flanked by tapering stepped shoulders and leading through to a solid slim D-shape shank. Marked platinum, circa 1935.