What are the uses of slate?
In the board often a small amount of sericite and other minerals, so that the surface of micro-silk silk gloss
Black or grayish black. Lithology dense, plate cleavage development
From the clay, silty sedimentary rocks or acid tuffy rocks, tuffs formed by a slight metamorphism.
Generally do not contain mineral slate，A metamorphic rock.
Slate can be used as building materials and decorative materials, ancient in the area rich in slate commonly used for tiles
