Anthracite for filter media is made of by breaking natural Anthracite coal to the desired size Abrasion resistant grains are characterized by their sharp edged structure and a splintery shape of grain. Anthracite is generally used as an upper layer in dual media filters. Anthracite typically produces consistent improvements in turbidity removal. Another advantage is that it being lighter in weight it does not let cake solidify and helps in increasing the life of the filter.