Slate is a metamorphic stone. It is usually quite fine grained and can be found in basic grays, greens and blacks. Also, more exotic color ranges exist that bring to a space a uniqueness of spirit rarely found elsewhere. Slate slabs yield exquisitely interesting kitchen and bath tops.

Per Wikipedia “Slate is a fine-grained, foliated, homogeneous metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low-grade regional metamorphism. It is the finest grained foliated metamorphic rock.[1] Foliation may not correspond to the original sedimentary layering, but instead is in planes perpendicular to the direction of metamorphic compression