Sterling silver. Needs a good polish but I only have a cloth. See other listing for the matching earrings. 100% authentic. Purchased from Tyson’s store several years ago. Been in my jewelry box. This sterling silver ball bracelet shines with every movement. Inspired by the bold architecture and edge of New York City, Tiffany HardWear combines gauge links and industrial shapes in striking silhouettes. An everyday styling essential, this ball bracelet makes a statement when mixed with a stack of gold Tiffany bracelets.