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J.E. Caldwell sapphire and diamond three stone ring. Set with a cushion shape sugar loaf natural unenhanced sapphire in an open back gypsy setting with an approximate weight of 1.50 carats, flanked by two round eight cut diamonds in open back grain settings with a combined approximate weight of 0.06 carats, to a graduating design with fancy shaped backholing and broad integrated shoulders which lead through to a solid D-shape shank. Marked 18 carat yellow gold and platinum, signed 'JEC CO', American, circa 1910.