sedimentary
Sandstone
Arenite
Hardness: 6-7 (Mohs scale), Color: tan/brown/yellow, Luster: dull/earthy, Structure: clastic/granular texture with visible sand grains, Cleavage: none, Specific Gravity: 2.2-2.8
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Physical properties
Hardness: 6-7 (Mohs scale), Color: tan/brown/yellow, Luster: dull/earthy, Structure: clastic/granular texture with visible sand grains, Cleavage: none, Specific Gravity: 2.2-2.8
Formation & geological history
Formed through the accumulation and cementation of sand-sized mineral particles or rock fragments in environments like deserts, riverbeds, or oceans over millions of years.
Uses & applications
Widely used as a construction material (dimension stone), in glass manufacturing (if high silica content), and for grindstones or decorative garden elements.
Geological facts
Sandstone makes up approximately 20% of all sedimentary rocks on Earth and is a primary reservoir rock for groundwater and petroleum due to its high porosity.
Field identification & locations
Identify by its gritty texture (feels like sandpaper) and visible layering (bedding). Found worldwide in sedimentary basins; common in the American Southwest and various UK coastal regions.
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Sandstone Grain
Clastic Sedimentary Rock Grain (SiO2 dominated)
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Sandstone
Arenite (primarily SiO2)
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