Travertine
Image: <a href="//commons.wikimedia.org/wiki/User:Bobjgalindo" title="User:Bobjgalindo">Bobjgalindo</a> (CC BY-SA 4.0)
Mineral NameTravertine
Chemical FormulaCaCO3
Mohs Hardness3
Crystal Systemtrigonal
Lusterdull
Streak Colorwhite
Cleavageperfect rhombohedral (of calcite)
Fractureuneven
Specific Gravity2.7
Colorsyellowish-brown, off-white, cream
Transparencyopaque
Type LocalityMontana, USA
Mineral GroupCarbonates (sedimentary rock)
Usesbuilding material, decorative stone, sculpture
Associated Mineralscalcite
Raritycommon
Description
The image displays a porous, yellowish-brown to off-white rock with an irregular, pitted surface, characteristic of a hot spring deposit.
Geological Context
Travertine is a terrestrial sedimentary rock formed by the precipitation of carbonate minerals, primarily calcite, from solution in ground and surface waters, often at the mouth of hot springs or in limestone caves.
