Noun
A white concretionary form of calcium carbonate, usually hard and semicrystalline. It is deposited from the water of springs or streams holding lime in solution. Extensive deposits exist at Tivoli, near Rome.
Source: Webster's dictionaryTravertine and all stone of that class can stand injury. Vitruvius
Building materials mainly include travertine, crushed stones, asphalt and asphalt concrete. Source: Internet
Because the waters are rich in calcium carbonate dissolved from the karst system, large deposits of travertine have accumulated on the waterfalls where turbulence causes mineral precipitation. Source: Internet
Dorsum or agger viae: the elliptical surface or crown of the road (media stratae eminentia) made of polygonal blocks of silex (basaltic lava) or rectangular blocks of saxum qitadratum (travertine, peperino, or other stone of the country). Source: Internet
More about alabaster and travertine, brief guide explaining the different use of the same terms by geologists, archaeologists and the stone trade. Source: Internet
That these had in fact carried waters for long periods was confirmed by the layers of travertine that encrusted it. Source: Internet