This crucible is perfect for melting precious metals such as gold, silver, aluminum, copper and brass. The crucible is about .100 gm to 10 kg , making it ideal for use with larger amounts of metal. Crucibles can come in handy for a number of hobby projects, including jewelry making, metalworking and gold prospecting. Just add your metal in, melt it and get to work! Make sure you grab one of these before your next metalworking project!