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.