Tiffany & Co. Colombian emerald and diamond crossover ring. Diagonally set with one cushion shape old cut natural Colombian emerald with minor oil in an open back claw setting with a weight of 1.93 carats, further set with one cushion shape old mine diamond, H colour, VS2 clarity, with a weight of 2.07 carats, in an open back claw setting, flanked by thirty eight rectangular baguette cut diamonds in open back channel settings with a combined approximate weight of 3.00 carats. The total approximate diamond weight is 5.07 carats, to an impressive crossover design featuring curving claws and polished edges, a pierced open gallery, and fancy shape open backholing, leading to tapered shoulders and flowing through to a solid undulating shank. Marked platinum, signed 'TIFFANY & CO.', maker's mark for Tiffany & Co., American, circa 1930, accompanied by a red leather Tiffany & Co box, and accompanied by Swiss Gemmological Institute (SSEF) report #123150, Gemmological Certification Services report #79178-05, and Gemological Institute of America (GIA) report #2221452480.
