SLATE 

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.

american olean kendal slate carlisle black tile

slate multi 464x464

black riven slate

italian slate texture concrete 001 1024x853

i slate texture

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