You may not know them by name, but by the time you get up, turn on a device or have your first cup of tea, you will have engaged with multiple critical minerals. As it springs into action, a dozen will come into play inside your mobile phone – materials with exotic names like indium, terbium, gallium and praseodymium, as well as the more prosaic nickel. Each volt of electricity you use will be brought to you along gleaming wires of copper – a cornerstone critical mineral.