travertines
/ˈtrævərˌtinz/
noun
- A type of white or light-colored limestone formed by mineral springs, often used in building.
- Travertines are popular for flooring because of their natural, elegant appearance.
- The hot springs deposited layers of travertines over thousands of years.
- The ancient Roman Colosseum was built largely from travertines quarried near Tivoli.