Why travertine for pools ?

The travertine is a kind of natural stone which is relatively softer and porous then marble etc., may get shine with a brushing type to its surface and may absorb water means it wont be slippery if you do not put a chemical on to its surface which will close its pores. For example; a kind of polish. Using travertine for pools will put advantage as being non-slippery and by the help of its soft structure its edges can be

softened for make them safe for feet and gain more natural look.