sedimentary
Sandstone
Arenite (primarily SiO2)
Hardness: 6-7 on Mohs scale; Color: Tan, brown, or light yellow; Luster: Dull to earthy; Crystal structure: Clastic (sand-sized grains); Cleavage: None; Specific gravity: 2.2-2.8
- Hardness
- 6-7 on Mohs scale
- Color
- Tan, brown, or light yellow
- Luster
- Dull to earthy
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Physical properties
Hardness: 6-7 on Mohs scale; Color: Tan, brown, or light yellow; Luster: Dull to earthy; Crystal structure: Clastic (sand-sized grains); Cleavage: None; Specific gravity: 2.2-2.8
Formation & geological history
Formed through the accumulation and cementation of mineral particles (sand) in environments like deserts, river beds, or beaches over millions of years.
Uses & applications
Widely used as a construction material for paving and house building, as well as a source of silica for glass manufacturing.
Geological facts
Sandstone is one of the most common types of sedimentary rock and often acts as a natural aquifer, storing significant amounts of groundwater and oil.
Field identification & locations
Identify in the field by its gritty, sandpaper-like texture and visible layers (bedding). It is found globally in sedimentary basins.
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