This is an estate Tiffany & Co. Elsa Peretti open heart pendant necklace in 18 karat yellow gold. This necklace features one open heart pendant measuring 36mm on a 30″ chain with a spring ring clasp. The weight is 9.6 dwt. Hallmarks: Tiffany & Co., Peretti, 750, Spain. Includes: Necklace and Box.