| It occurs in a wide variety of mineral forms, including limestone, marble, travertine, and chalk. |
| At the Farnsworth House the two bathrooms, in cool contrast, have pristine travertine floors and walls and chrome plumbing fittings. |
| The huge blocks of travertine of which it is built were taken from the Coliseum. |
| Cave walls down which water habitually runs may become covered with sheets of travertine flowstone. |
| The substruction of this temple, which has been laid bare, consists of tufa cased with travertine. |
| The result is the formation of solid structures of a porous calcium carbonate rock also known as travertine. |
