An oxidized sterling silver sea urchin features a 4.5 mm Swiss blue topaz in a 14K gold bezel.  The urchin was molded from a genuine Jurassic Period fossil and retains all its textures and details.  The pendant is approximately 5/8 inches (1.6 cm) in diameter with a hidden bail.  Beautiful on either a cord or a chain (sold separately). The chain in the photos is a sterling silver 1.5 mm cable chain.