Onyx's unparalleled versatility and exotic beauty build an aura of nearly unrivaled elegance and sophistication. Most of the onyx used in home decoration comes from calcite, a mineral which is also the basis for travertine, calcareous stone, and marble. However, its resemblance to the latter is the reason why onyx is sometimes called "onyx marble." Onyx has a smooth and porous base, much like marble. It has a relatively low density, similar to the marbles. It makes it more pliable and smoother than other natural stone tiles. This comes in a variety of colors that are mostly earth-toned and can be finished in several ways, although it is usually polished to a high shine.