Dirty travertine shower needs cleaned! This shower has grime and calcium build up from everyday use. Improper care can result in dull surfaces and loss of luster on travertine surfaces. Travertine needs extra care because of the pourous state of the stone. Pesky holes allow for dirt to escape deeper into the stone where over the counter products cannot reach. Cleaning, diamond honing, and sealing with professional product and experience was the method used to bring shine back to this beautiful travertine shower. This shower looks great!