sedimentary
Sandstone (Quartzose)
Arenite (SiO2)
Hardness: 6-7 (individual grains); Color: Tan, beige, or light brown; Luster: Dull/Earthy; Crystal structure: Clastic/Granular; Cleavage: None; Specific Gravity: 2.2-2.8
- Hardness
- 6-7 (individual grains)
- Color
- Tan, beige, or light brown
- Luster
- Dull/Earthy
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Physical properties
Hardness: 6-7 (individual grains); Color: Tan, beige, or light brown; Luster: Dull/Earthy; Crystal structure: Clastic/Granular; Cleavage: None; Specific Gravity: 2.2-2.8
Formation & geological history
Formed through the accumulation and cementation of sand-sized mineral grains or rock fragments, typically in desert, river, or ocean environments over millions of years.
Uses & applications
Commonly used in construction as a building material and paving stone; also used for glass manufacturing when high in silica.
Geological facts
Sandstone contains a significant portion of the Earth's groundwater or petroleum reservoirs due to its high porosity and permeability.
Field identification & locations
Identify by its gritty, sandpaper-type feel and visible sand grains. Found globally in sedimentary basins. Collectors often look for unique banding or fossils within it.
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