sedimentary
Sandstone
Arenite (SiO2 principal)
AI-generated identification · may be incorrectHardness: 6-7 Mohs; Color: Tan, brown, or gray; Luster: Dull/Earthy; Crystal structure: Granular clastic; Cleavage: None; Specific gravity: 2.2-2.8
- Hardness
- 6-7 Mohs
- Color
- Tan, brown, or gray
- Luster
- Dull/Earthy
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Physical properties
Hardness: 6-7 Mohs; Color: Tan, brown, or gray; Luster: Dull/Earthy; Crystal structure: Granular clastic; Cleavage: None; Specific gravity: 2.2-2.8
Formation & geological history
Formed by the accumulation and lithification of sand-sized mineral grains or rock fragments, typically from ancient riverbeds, beaches, or desert dunes over millions of years.
Uses & applications
Extensively used in construction, paving, landscaping, and as a raw material for glass manufacturing and filters.
Geological facts
Sandstone is highly porous and can serve as an important aquifer or reservoir for petroleum and natural gas. Some sandstones contain fossilized imprints of prehistoric life.
Field identification & locations
Identified by its gritty 'sandpaper' feel and visible grain structure. Commonly found in deserts, coastal regions, and sedimentary basins worldwide.
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