sedimentary
Sandstone
Arenite (SiO2 primarily)
Mohs Hardness: 6-7; Color: Tan, brown, reddish; Luster: Dull/Earthy; Crystal Structure: Clastic grains; Cleavage: None; Specific Gravity: 2.2-2.8.
- Hardness
- 6-7
- Color
- Tan, brown, reddish
- Luster
- Dull/Earthy
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Physical properties
Mohs Hardness: 6-7; Color: Tan, brown, reddish; Luster: Dull/Earthy; Crystal Structure: Clastic grains; Cleavage: None; Specific Gravity: 2.2-2.8.
Formation & geological history
Formed by the accumulation and lithification of sand-sized mineral particles or rock fragments across geological eras, primarily in desert, river, or coastal environments.
Uses & applications
Used extensively in construction as building stone, as a source of silica for glass manufacturing, and as a reservoir rock for oil and natural gas.
Geological facts
Sandstone represents about 20% of all sedimentary rocks on Earth and can preserve incredible fossil records and ripple marks from ancient water bodies.
Field identification & locations
Identify by its gritty, sandpaper-like texture and visible mineral grains. It is commonly found in sedimentary basins and arid regions globally.
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