From the display and metal casing to the circuit boards that power the device, your phone is a mine of precious metals. But mining these metals from ore can be arduous; it takes a tonne of ore to get 1g of gold. Copper and aluminium, typically lower value than precious metals, can also be found in your smartphone, in the casing or the circuit board. There is more than just precious metals in your smartphone. Cobalt is also used in smartphone batteries.

Source: The Irish Times April 19, 2018 00:56 UTC