Rockart Thassos is a 12" x 13" natural stone mosaic. The face carries the movement of split stone while staying flat enough to lay tight. Natural stone varies piece to piece, which is what gives a floor its depth, and wants sealing on installation. It suits walls and light-traffic areas. Supplied on mesh sheets, so it follows a curve and cuts around an outlet without the tile having to be scored. Order the area you are covering plus about ten percent for cuts and waste.