Tiffany & Co 18kt Yellow Gold Sapphire and Diamond Ring. 1.65ct Blue SapphireAuthentic 18kt yellow gold blue Sapphire and diamond ring. This ring features a cushion cut faceted blue Sapphire stone weighing 1. 65 carat weight. This stone is flanked by 2 x 0. 54 total carat weight of Brilliant cut diamonds of (I) in colour and (VVS 1) in clarity. Current finger size: 6. This ring can be resized. Hallmark: Tiffany & Co. Very Good Condition Accompanied by the original Tiffany & Co box and papers