(Also see Honed & Tumbled Stone, Polished Stone and Pebble Tile & River Rock Mosaics)
Natural stone is a product of nature and includes granite, marble, travertine, slate, limestone, onyx, pebble tile and river rock. Polished Stone will have a slick, shiny, reflective surface. Honed & Tumbled Stone will have a matte, dull finish and may also contain deep voids and pitted areas. All stone should be pre-sealed before grouting to prevent grout pigment from permanently staining the surface of the stone.