Travertine and Filled Versus Unfilled
Travertine is a form of limestone laid down by mineral springs, full of natural holes and a warm, earthy colour range. It comes filled, with the holes packed with resin or cement, or unfilled for a rustic texture.
Filled travertine is smoother and easier to clean. Tumbled travertine, with softened edges, is popular in sunrooms and Mediterranean-style interiors.