The best natural stone tile for bathrooms is typically marble due to its luxurious look and durability. Popular options like Carrara White and Calacatta Gold marble provide a timeless elegance with beautiful veining patterns. For bathroom floors, honed marble is preferred as it offers better slip resistance compared to polished marble. Other suitable choices include travertine and limestone, which add a rustic charm but may require more maintenance due to their porous nature. Sealing these tiles regularly ensures they remain resistant to water and stains, making them an excellent long-term investment for bathrooms.