sedimentary
Sandstone (Quartzose)
Arenite (primarily 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 from the accumulation and lithification of sand-sized mineral grains, typically in deserts, riverbeds, or beaches over millions of years.
Uses & applications
Widely used in construction for building stone, pavers, and as a source of silica for glass manufacturing.
Geological facts
Sandstone contains about 20% of the world's groundwater resources and can preserve intricate fossils and ripple marks from ancient environments.
Field identification & locations
Identify in the field by its gritty, sandpaper-like texture and visible grains. It is extremely common globally in sedimentary basins and plateaus.
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