An Art Deco Platinum, Colombian Emerald and Diamond Ring, Tiffany & Co., containing one octagonal step cut emerald measuring approximately 7.90 x 7.25 x 3.57 mm and 16 old European and transitional brilliant cut diamonds weighing approximately 0.16 carat total.Stamp: TIFFANY & CO. Accompanied by an American Gemological Laboratories emerald identification and origin certificate number CS 1076932, dated July 18, 2016, stating Mineral Type: Natural Beryl, Variety: Emerald, Origin: Colombia, Clarity Enhancement: Insignificant to Minor, Traditional. 1.80 dwts.