For sale is this authentic, Tiffany & Co., 18k gold, open teardrop necklace by designer Elsa Peretti. The pendant measures over 3/4" wide at the base and is 1/4" thick. It hangs from its original Tiffany & Co. 18k gold 16" long chain. It weighs 8.4 grams and has absolutely no damage or repairs. While easily recognizable as an Elsa Peretti design, it was replaced with the closed teardrop necklace in the late 1980's.