sedimentary
Sandstone
Arenite (primarily SiO2)
AI-generated identification · may be incorrectHardness: 6-7 Mohs; Color: Tan, beige, or grey; Luster: Dull/Earthy; Crystal structure: Granular/Clastic; Cleavage: None; Specific Gravity: 2.2-2.8
- Hardness
- 6-7 Mohs
- Color
- Tan, beige, or grey
- Luster
- Dull/Earthy
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Physical properties
Hardness: 6-7 Mohs; Color: Tan, beige, or grey; Luster: Dull/Earthy; Crystal structure: Granular/Clastic; Cleavage: None; Specific Gravity: 2.2-2.8
Formation & geological history
Formed through the accumulation and cementation of mineral particles or rock fragments of sand size (0.0625 to 2 mm). Usually deposited in river, lake, or ocean environments over millions of years.
Uses & applications
Widely used as a building material, masonry, road base, and in glass production when high in silica.
Geological facts
Sandstone makes up about 10 to 25 percent of all sedimentary rocks on Earth. It is porous and often acts as a natural filter or a reservoir for oil and groundwater.
Field identification & locations
Identify by its gritty, sandpaper-like texture and visible grains. Common in desert regions or near ancient coastal environments. Look for bedding planes or layers.
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