Travertine:
Travertine is a whitish, porous or crystalline mineral form of calcium carbonate, deposited in layered formations by hot and cold spring waters. In part because it is soft and easily worked, travertine has been a favorite building and decorative stone from preclassical times to the present. Travertine surfaces may be finished in a number of ways: polished, honed, smooth, sawn, filled or unfilled. Its application can be interior accessories, building stone, countertops, fireplaces, flooring and landscaping. Regardless of the intended application, travertine imparts an ageless beauty while providing a largely neutral color range that can be incorporated into any design scheme.
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