Recycling Gold

Gold is a valuable material. Recycling and reusing gold is not new to the jewellery industry. Some jewellers don't collect their scraps and filings to be recycled, but this is in the vast minority, as it is a costly habit to have. To recycle gold jewellery, the item must first be identified as real gold. A karat stamp is often visible inside the band of the ring. If a stamp is not visible, the metal can be tested. This is called a scratch test. The jewellery is rubbed against a scratch stone, leaving a mark of the metal. Then an acid...