Pewter Pendants Thunderbird - Geometric These pendants are made of high quality pewter with a Thunderbird geometric design on a round disc. The smooth brushed finish and quality etching make the pendant look like real sterling silver. The large bail accommodates just about any ready-to-wear cords. Lead-free and nickel-free. This photo is an attempt to show you the size of the pendant, but it's true dimensions are 27mm diameter x 37mm long.