sedimentary
Sandstone
Clastic Sedimentary Rock
Hardness: 6-7 (depending on cement), Color: Brown, tan, yellow, or red, Luster: Dull to earthy, Crystal Structure: Clastic with quartz grains, Cleavage: None, Specific Gravity: 2.2-2.8
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Physical properties
Hardness: 6-7 (depending on cement), Color: Brown, tan, yellow, or red, Luster: Dull to earthy, Crystal Structure: Clastic with quartz grains, Cleavage: None, Specific Gravity: 2.2-2.8
Formation & geological history
Formed from the accumulation, compaction, and cementation of mineral particles or rock fragments, principally quartz and feldspar, in environments such as deserts, rivers, and beaches over millions of years.
Uses & applications
Used widely in construction as building stone, paving material, and in the manufacture of glass and concrete.
Geological facts
Sandstone is often porous and permeable, making it an excellent aquifer for storing groundwater and natural gas.
Field identification & locations
Identified by its gritty texture, visible sand grains, and layered sedimentary structure. Found worldwide in deserts, riverbeds, and ancient sea beds.
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Quartz pebble
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Generic Pebble / Rock Fragment
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Banded Siltstone / Mudstone Pebble
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