The raw material of ARDÓSIA NACIONAL is traditionally known for its high degree of hardness, 8.5 on the Moh’s scale, in addition to providing plates greater than 2.50 m in length.

This slate is a special type that does not allow opening plates less than 2 cm thick, being ideal for landscaping, floors, steps, table tops, thresholds, benches, partitions, billiard tops, among other things, due to its high degree of hardness and resistance.