The precious metal silver clays from Art Clay Silver. These clays consists of finely ground pure silver mixed with non-toxic binders and water. When kiln, torch or stove-top fired, the binders burn away leaving pure, 99.9% silver and the resulting pieces can be hallmarked. On our website you will find a range of firing tools, pure silver jewellery findings and fireable gem stones. The Art Clay Silver 950 Clays contain 95% silver and 5% copper (as opposed to 92.5% silver and 7.5% alloy in sterling silver). They can be used to create finer jewellery than the other Art Clay Silver Clay types and produce a harder, enriched silver which can be hallmarked sterling silver. These clays need to be fired in a temperature controlled electric kiln only.