Silver is a precious metal often used to make jewellery.Sterling is the quality standard and is an alloy of 92.5% silver. The remainder is usually copper.Does this mean that silver jewellery is made of pure silver?Yes, because a pure substance is one that contains only one type of element or compound and the jewellery only contains silver.No, because a pure substance is one that contains only one type of element or compound. As the silver is mixed with copper to make jewellery, it is not pure.No, because a pure substance is one that contains two or more different elements or compounds and the jewellery only contains silver.Yes, because a pure substance is one that contains two or more different elements or compounds and the silver in jewellery contains different elements.