It's dense, banded rock composed of calcium carbonate, CaCO3. Formed by rapid chemical precipitation of calcium carbonate from solution in surface and ground waters, it is a variety of limestone that has a light color and takes a good polish. The characteristic holes in travertine are the result of trapped gas bubbles as the gas escapes, crystals form in the cavities. The resultant stone is a smooth, porous, naturally decorative material which offers a soft cream hue, and overall old-world beauty, and a dense and durable surface. |