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Antique sapphire and diamond three stone ring. Set with a round old cut natural unenhanced sapphire to centre in an open back rubover gypsy setting with an approximate weight of 1.10 carat, flanked by two round old cut diamonds in open back rubover gypsy settings with an approximate combined weight of 0.80 carats, to a heavy tapering yellow gold form, conforming to the finger with circular backholing, and tapering to a solid D-shape shank. Tested 18 carat yellow gold, maker's mark 'B.S&F.' for Black, Starr & Frost, American, circa 1900, accompanied by Gemmological Certification Services report #79187-28.