sedimentary
Sandstone
Arenite
Hardness: 6-7 Mohs; Color: Tan, brown, yellow, red; Luster: Dull/Earthy; Structure: Clastic; Cleavage: None (conchoidal fracture on grains); Specific Gravity: 2.2-2.8
- Hardness
- 6-7 Mohs
- Color
- Tan, brown, yellow, red
- Luster
- Dull/Earthy
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Physical properties
Hardness: 6-7 Mohs; Color: Tan, brown, yellow, red; Luster: Dull/Earthy; Structure: Clastic; Cleavage: None (conchoidal fracture on grains); Specific Gravity: 2.2-2.8
Formation & geological history
Formed through the accumulation and cementation of sand-sized silicate grains (mostly quartz and feldspar) in environments like deserts, river deltas, or beaches over millions of years.
Uses & applications
Widely used as a construction material (building stone), as a decorative garden element, and for historical monument restoration.
Geological facts
Sandstone is one of the most common types of sedimentary rock and is often where significant groundwater aquifers and petroleum reservoirs are found.
Field identification & locations
Identify by its gritty texture (feels like sandpaper) and visible layering. It is found globally in large sedimentary basins and mountain ranges.
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