Because most immigrants were poor when they arrived, they often lived on the Lower East Side of Manhattan, where rents for the crowded apartment buildings, called tenements, were low. The Lower East Side Tenement Museum is in a building that used to be a tenement and it tells the story of immigrants in the City.
Change to a 115-grit diamond resin attachment and repeat the procedure as stated in Step 2. This attachment is less harsh than the 400-grit resin bond and will produce a smoother finish. Remember to constantly add water to the surface as you sand the travertine tile.
Changing the color of tile... With Travertine being a pourous stone it would absorb any type of color pretty well. My suggestion...coffee or tea. That friend of mine darkened the color of his tile using tea to stain it. It's interesting and looked really good when all was said and done.