This beautiful authentic necklace is from Tiffany & Co. by designer Elsa Peretti from her Open Heart collection. The necklace features a 16" long chain with the two ends open and can be tied into a pendant, one end of the chain has Peretti's open heart and the other end has an oval shape white shimmering pearl. It secures with a round clasp and is signed by the designer with the metal content.Material: 18k yellow goldHallmark: Tiffany & Co. 750 Peretti SpainPearl: 8.5mm long x 7.6mm thickMeasurements: chain is appx: 16" longPendant: appx : 1" long x 10.8mm wideWeight: 8.1 grams