sedimentary
Sandstone
Arenite (SiO2 based)
Hardness: 6-7 Mohs scale; Color: Tan, brown, reddish-brown; Luster: Dull or earthy; Crystal structure: Clastic (grainy texture); Specific Gravity: 2.2-2.8.
- Hardness
- 6-7 Mohs scale
- Color
- Tan, brown, reddish-brown
- Luster
- Dull or earthy
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Physical properties
Hardness: 6-7 Mohs scale; Color: Tan, brown, reddish-brown; Luster: Dull or earthy; Crystal structure: Clastic (grainy texture); Specific Gravity: 2.2-2.8.
Formation & geological history
Formed from the accumulation and lithification of sand-sized mineral particles or rock fragments, typically through pressure and mineral cements in rivers, lakes, or deserts.
Uses & applications
Extensively used as a building material, in construction projects, as paving material, and occasionally for grindstones or filtering systems.
Geological facts
Sandstone represents about 20% of all sedimentary rocks on Earth and is critical for containing groundwater aquifers and petroleum reservoirs.
Field identification & locations
Identify by its gritty, sandpaper-like feel and visible layered bedding. Common in canyons and desert landscapes like the American Southwest.
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