Polymer Clay earrings are baked at 265 degrees, after which a layer of clear coat is applied to the front, and then UV resin is used to attach the Post or Hook onto the back. Because of the complexity in the mixing process, it will be rare to have a batch of colors replicated, making each piece within a set unique. All earrings are mounted on stainless steel, which should be the most universally compatible for wearers (please notify The Office if there are any problems though).