Ichthus Fish Dark Metal Necklace is a lead free pewter pendant that has a special antique Dark Metal finish that is awesome. It features a very cool fish pendant that comes on a soft black cord that measures 22 inches with lobster claw closure. What is a Gun Metal? It is a special finish that is darker than silver finishes but not full black. It is a smooth dark gray finish that is very close to the same color as the barrel of a fire arm.