sedimentary
Sandstone (with potential iron mineralization)
Arenite
Hardness: 6-7 (Mohs); Color: Brown, tan, gray; Luster: Dull/Earthy; Crystal structure: Clastic (sand grains); Cleavage: None; Specific gravity: 2.2-2.8
- Hardness
- 6-7 (Mohs)
- Color
- Brown, tan, gray
- Luster
- Dull/Earthy
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Physical properties
Hardness: 6-7 (Mohs); Color: Brown, tan, gray; Luster: Dull/Earthy; Crystal structure: Clastic (sand grains); Cleavage: None; Specific gravity: 2.2-2.8
Formation & geological history
Formed from the accumulation and cementation of sand-sized mineral grains or rock fragments (clasts). Common in river beds, deserts, and beach environments across various geological eras.
Uses & applications
Used primarily in construction as a building material and paving stone; also used for grindstones and in glass manufacturing.
Geological facts
Sandstone is one of the most common sedimentary rocks on Earth. It often preserves fossils and ripple marks from ancient water currents or wind formations.
Field identification & locations
Identify by its gritty texture (feels like sandpaper) and visible sand grains. Commonly found in canyons and sedimentary basins.
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