sedimentary
Sandstone
Arenite
Hardness: 6-7 Mohs scale; Color: Tan, beige, grey; Luster: Dull/Earthy; Crystal structure: Clastic (grains of sand); Cleavage: None; Specific gravity: 2.2-2.8
- Hardness
- 6-7 Mohs scale
- Color
- Tan, beige, grey
- Luster
- Dull/Earthy
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Physical properties
Hardness: 6-7 Mohs scale; Color: Tan, beige, grey; Luster: Dull/Earthy; Crystal structure: Clastic (grains of sand); Cleavage: None; Specific gravity: 2.2-2.8
Formation & geological history
Formed through the accumulation, compaction, and cementation of sand-sized mineral particles or rock fragments, typically occurring in riverbeds, deserts, or coastal environments over millions of years.
Uses & applications
Majorly used in construction for flagstone, building facades, and as an abrasive in industry. High-purity silica sandstone is used in glass making.
Geological facts
Sandstone reserves often act as natural aquifers and reservoirs for petroleum and natural gas due to their porosity and permeability.
Field identification & locations
Identify by its gritty texture (feels like sandpaper) and often visible layering; found globally in canyons, plateaus, and ocean floors.
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