Natural stone tile is tile cut from quarried rock—think marble, granite, travertine, limestone, slate, or quartzite—rather than being man-made. Each piece is unique in color and veining, highly durable, and suitable for floors, walls, showers, and some outdoor areas. Because most stones are porous, they typically require sealing and pH-neutral cleaning. Finishes range from polished to honed, tumbled, or brushed, giving options from glossy and refined to rustic and textured.