Black Slate is a slate with tones of black, blue, and grey. Black slate is available in perfectly sized tiles. Black Slate varies mostly in the ratio of charcoal to blacks; it is uncommon to find pieces that are entirely black. Black Slate is an industrial quality slate that can survive extreme weather conditions all over the world. Black Slate honed has such a gorgeous and compelling appearance that it seems as though charcoal and grey clouds are scattered all over the surface of the stone, which is unlike anything most people have seen before.