What is pewter

Pewter is an attractive alloy that, once heated, becomes molten and ideal for casting. The pewter mix consists mostly of tin, which offers a stunning sheen and a resistance to corrosion. This is mixed with antimony, a white metal contributing as little as 5% of the pewter composition that has an expanding property required in the spin casting method and allows the artworks to picks up detailed effects from the mould.  

Small amounts of other metals such as copper are included to harden and make each artwork more durable. Lead is understandably, not used in the manufacturing of pewter anymore, due to its toxicity.