sedimentary
Sandstone
Sandstone (Siliciclastic Sedimentary Rock)
Hardness: 6-7 (Mohs scale), Color: Grayish-brown with visible reflective quartz and mineral grains, Luster: Dull to earthy with tiny sparkly flecks, Structure: Granular/clastic matrix, Cleavage: None
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Physical properties
Hardness: 6-7 (Mohs scale), Color: Grayish-brown with visible reflective quartz and mineral grains, Luster: Dull to earthy with tiny sparkly flecks, Structure: Granular/clastic matrix, Cleavage: None
Formation & geological history
Formed through the accumulation, compaction, and cementation of sand-sized mineral particles (predominantly quartz, feldspar, and mica) over millions of years in riverbed, beach, or desert environments.
Uses & applications
Widely used as a building material, paving stone, decorative landscaping stone, and historically for grindstones.
Geological facts
Sandstone acts as an important underground reservoir for water (aquifers) and petroleum due to its high porosity and permeability.
Field identification & locations
Identified by its gritty, sandpaper-like texture and visible sand grains. Highly abundant in sedimentary basins, riverbeds, and coastal regions worldwide.
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