Travertine is a type of limestone that forms in hot mineral springs all around the world. When pure, travertine is white, because the main mineral that makes it up is white coloured calcium. Due to impurities - sulfur, iron compounds, organic pigments - travertine can come in different colors and shades: walnut, red, yellow or beige. This sedimentary rock is porous, and even has very small visible holes. The holes in travertine slabs can either be filled with special sealant or left open. Sealing travertine is highly recommended as stain removal can be limited due to its chemical sensitivity.
Travertine is frequently used in Europe and elsewhere as building material. The Romans mined deposits of travertine for building temples, aqueducts, monuments, bath complexes, and amphitheaters such as the Colosseum, the largest building in the world constructed mostly of travertine. Because of its modesty and neutrality, travertine is often used by designers in private and public spaces. It is easy to maintain the travertine‘s non-slip surface.