Calcium: What do we use it for and where is it found?

Calcium is one of the most abundant minerals on earth – it’s the most common mineral in the human body and has a host of industrial uses.

This silvery-white, soft metal is the fifth most abundant mineral in the Earth’s crust. It tarnishes rapidly in air, reacts with water and is the third most common metal after iron and aluminium. It is the main ingredient in limestone.