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Antique Tiffany & Co. ruby and diamond three stone ring. Centrally set with a round old cut natural unenhanced ruby in an open back claw setting with an approximate weight of 0.50 carats, flanked by two round old cut diamonds in open back claw settings with a combined approximate weight of 0.70 carats, to a carved half hoop with intricate pierced scrolling details to the gallery, fancy backholing and further carved scrolls to the shoulders flowing through to a solid D-shape shank. Tested yellow gold, maker's mark 'Tiffany & Co', American, circa 1900.