The travertine is a sedimentary rock polycrystalline rock, formed through precipitation of calcium carbonate from mineral or thermal springs or running water, rich with calcium. It mostly has a striped structure in the direction of the water, but it can also be encountered in the shape of concentric circles. According to the place of formation we can discern travertine form springs, travertine from running waters, travertine from cave (stalagmites, stalactites).
The travertine is a fragile stone, it contains pores. It is usually colored in beige, yellow, white, pink or ocher, depending on the impurities and the minerals. It can contain limestone, clay and other precipitates. Its density is low and uneven – 2,0 g/sm³.It can be polished and varnished.
It is formed as a result of precipitation of calcium carbonate from springing waters. When coming out on the surface the pressure of the underground waters drops abruptly, which leads to the process of chemical reaction, in which the insoluble in water calcium carbonate is released and precipitated.