Artistic Wire Natural Copper is copper wire coated to inhibit tarnishing. The coating is engineered to resist tarnishing, chipping, and peeling. Artistic Wire is the most extensive line of copper wire for jewelry and crafts. The wire has an exclusive enamel coating that is available with a glossy metallic finish, or in a matte finish. The coating is engineered to resist tarnishing, chipping, and peeling and to stand up to coiling, spiral making, twisting, wrapping, and other wire working techniques.