Metal clay is a wonderful almost magical material. It's made from extremely fine particles of metal, mixed with organic binders and water. You shape it like modelling clay, leave it to dry, and then fire to burn off the binder - you're left with solid silver (or gold, sterling silver, bronze, or copper, depending on what clay you use). It feels like alchemy magic!
Here at Metal Clay Ltd you can find Art Clay Fine and Sterling Silver and Gold, as well as Goldie Bronze, Copper, and Iron base metal clays, Metal Adventures Bronze and Copper base metal clays, and Prometheus Base metal clays.
Art Clay Silver Clay (ACS), Art Clay 950 Sterling Clay, Art Clay Copper, and Gold Clay, made by Aida Corporation, Precious Metal Clay (PMC), made by Mitsubishi Materials are the two original brands from Japan. These are often referred to as metalclay, silverclay, or precious metal clay. BronzClay and CopprClay were invented by Bill Struve's Metal Adventures in the USA.