sedimentary
Travertine / Tufa
Calcium Carbonate (CaCO3)
AI-generated identification · may be incorrectHardness: 3 on Mohs scale. Color: Cream, tan, reddish-brown, light pink. Luster: Dull, earthy, or resinous. Structure: Porous, fibrous, or concentric microcrystalline aggregate.
- Hardness
- 3 on Mohs scale
- Color
- Cream, tan, reddish-brown, light pink
- Luster
- Dull, earthy, or resinous
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Physical properties
Hardness: 3 on Mohs scale. Color: Cream, tan, reddish-brown, light pink. Luster: Dull, earthy, or resinous. Structure: Porous, fibrous, or concentric microcrystalline aggregate.
Formation & geological history
Formed by the precipitation of calcium carbonate around hot springs, in limestone caves (stalactites/stalagmites), or along river beds rich in dissolved calcium.
Uses & applications
Used widely as a decorative building stone, floor tiling, landscaping rock, and for ornamental carvings.
Geological facts
Travertine is famous for its use in ancient Roman architecture, including the exterior of the Colosseum in Rome.
Field identification & locations
Identified by its lightweight, porous texture, earthy color palette, and strong reaction (fizzing) when exposed to dilute hydrochloric acid. Commonly found near geothermal springs and karst regions.
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