Sapphire and diamond cluster engagement ring by Tiffany & Co. Centrally set with a cushion shape old cut natural unenhanced sapphire, Montana likely origin, in an open back grain setting with an approximate weight of 2.30 carats, encircled by a single row of cushion shape old cut diamonds in open back claw settings with an approximate combined weight of 0.85 carats, to an elegant circular cluster with intricate pierced curving claws and open backholing, flanked by trumpeted shoulders leading to a solid tapered lightly rounded shank. Tested 18 carat yellow gold, signed 'TIFFANY & CO', circa 1900, accompanied by Gemmological Certification Services report #5775-1537.
