Slate has a natural tendency to break into large, smooth, flat pieces which makes it very easy to build with. Slate has been used for roofing tiles, walkways, blackboards, small writing tablets, billiard tables, laboratory counter tops, tombstones and floor tiles.
It is often sealed to maintain its appearance. It is available with a smooth finish suitable for chalkboards or a rougher, non-skid finish that makes for durable non-skid footing.