Express your personal style with genuine silver charms. Return To Tiffany heart and Tiffany box lock charm necklace. genuine silver. Heart lock open and close. Oval link necklace. genuine Silver. 16" long.--A Tiffany necklace is a personal expression that is all your own. A signature piece will always proclaim your personal style. The Tiffany necklaces we offer you are top grade quality and crafted by genuine silver. Each item will come with original Tiffany & Co gift packs including the blue box, pouch, silver care card and gift bag.