Travertine is a type of natural stone formed from mineral deposits, commonly used in both interior and exterior applications for its durability and distinctive appearance. Travertine is often used for flooring, patios, pool decks, and countertops due to its ability to remain cool underfoot and its unique, earthy color variations. This porous stone typically has a smooth, matte finish and can be left in its natural state or filled and polished for a more refined look.