sedimentary
Sandstone
Arenite (SiO2 composition dominant)
AI-generated identification · may be incorrectHardness: 6-7 (Mohs); Color: Tan, brown, or reddish; Luster: Dull or earthy; Structure: Clastic; Texture: Gritty like sandpaper; Specific Gravity: 2.2-2.8
- Hardness
- 6-7 (Mohs)
- Color
- Tan, brown, or reddish
- Luster
- Dull or earthy
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Physical properties
Hardness: 6-7 (Mohs); Color: Tan, brown, or reddish; Luster: Dull or earthy; Structure: Clastic; Texture: Gritty like sandpaper; Specific Gravity: 2.2-2.8
Formation & geological history
Formed through the accumulation and cementation of sand-sized mineral particles or rock fragments in environments like deserts, riverbeds, or beaches over millions of years.
Uses & applications
Widely used as a building material, paving stone, in the manufacture of glass, and for artistic sculptures.
Geological facts
Sandstone makes up about 20% of all sedimentary rocks on Earth. Famous landmarks like the Treasury at Petra and the Red Rocks Amphitheatre are carved from or made of sandstone.
Field identification & locations
Identify by its gritty texture and visible sand grains. Commonly found in arid regions, coastal bluffs, and river basins worldwide.
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Arenite (if sandstone)
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Generic Pebble / Rock Fragment
Lithic fragment / Weathered rock
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Sedimentary Sandstone
Arenite (Sedimentary Rock)
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Shale (or Mudstone/Siltstone)
Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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