An Important Edwardian Yogo Gulch Montana Sapphire and Diamond Bracelet, Tiffany & Co., containing ten oval mixed cut Yogo Gulch Montana sapphires, the largest measuring approximately 7.40 x 5.50 x 3.94 mm and the smallest measuring approximately 6.50 x 5.50 x 3.64 mm, and 27 old European cut round diamonds weighing approximately 1.35 carats total.Stamp: TIFFANY&CO. Accompanied by a box signed TIFFANY & CO NEW YORK.Accompanied by an American Gemological Laboratories sapphire identification and origin certificate number 1091720 (nine gemstones tested), dated April 13, 2018, stating Mineral type: Natural Corundum, Variety: Sapphire, Origin: USA (Montana-Yogo Gulch), Enhancement: No gemological evidence of heat. 8.40 dwts.