When crystalline minerals are exposed to energy, they tend to break into an infinite number of shaped particles. The problem of reducing the dimensions is limiting the number of coarser and finer particles during the grinding process. If this action is not controlled, the minerals will follow their natural crystalline behavior, which will lead to the production of many soft particles.

Reduce size in a mine is done in two stages. In the first stage, stone crushers are placed in the line, which is called crushing, and in the second stage, there is a stone mill, where grinding is performed.