Metal detectors can easily find aluminium, iron, nickel, copper, brass gold, silver, bronze tin, and lead. Along with these, you can also hunt for jewellery, coins and other metal substances in the ground. Here, the process of ‘discrimination’ comes into the picture. It mainly refers to the process of distinguishing between alloys and metal targets, as per the need. You can also set the detectors to pick up signals for particular metals only.