Fine Silver Clay is a metal clay that can be molded and shaped like clay and then fired in a kiln at high temperatures. The resulting piece is solid metal. Fine Silver is 99.9% pure silver. Fine silver will not tarnish.
Bronze Metal Clay can be molded and shaped like clay and then fired in a kiln at high temperatures. The resulting piece is solid metal. Bronze is an alloy of tin and copper. Bronze can darken over time, but a quick buff with a jewelry cloth will return the shine.