The Antiqued Copper slider pendants are made from solid copper wire. They are not plated. The wire has been artificially oxidized for an antiqued look. Please note that artificially oxidized jewelry should not be cleaned in any type of commercial jewelry cleaning solution as this will remove the oxidation. If you would like to clean the piece, you should only use a polishing cloth to rub off any excess tarnish you wish to remove and give it a nice shine.