Travertine Polishing is done to renew the surface of the stone which has been damaged. Travertine is a natural stone popularly used for decorative purposes. This stone has actually been used in building architecture since time immemorial for its accessibility and beauty. Travertine is increasingly seeing more use in modern architecture and this is where the problem arises. Travertine deposits form in hot springs and limestone caves, with bubbles permeating the stone due to the escape of carbon dioxide during its formation. The spaces left by the escaping gases leave some forms of travertine almost like a sponge while less degrees of bubbles make a more solid rock. This makes travertine softer than marble or granite. Travertine is also more susceptible to damage by acids and to staining by fluids.