Stone in showers, bathtubs, or in bathtub surrounds needs special attention, as it needs to be sealed against moisture and maintained on a regular basis. It is inadvisable to lay smooth stone on shower pans due to safety issues caused by slipping.
Even outside of the shower, stone can be affected by indirect moisture and should be sealed on a regular basis.
Though slate produces a dark, gloomy feeling within showers, it works well in the bathroom on the floor or walls.
Marble is another popular wall tile material.