sedimentary
Sandstone
Sedimentary rock composed mainly of quartz sand grains
Hardness of 6 to 7 on the Mohs scale, typically brown, tan, yellow, red, or grey in color, dull or earthy luster, granular texture, specific gravity around 2.2 to 2.8.
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Physical properties
Hardness of 6 to 7 on the Mohs scale, typically brown, tan, yellow, red, or grey in color, dull or earthy luster, granular texture, specific gravity around 2.2 to 2.8.
Formation & geological history
Formed from the accumulation, compaction, and cementation of mineral particles or rock fragments, predominantly quartz, in environments such as deserts, rivers, and beaches over millions of years.
Uses & applications
Widely used in construction, building facades, paving, and formerly for grindstones.
Geological facts
Sandstone formations often create striking geological features like arches, cliffs, and canyons due to differential weathering.
Field identification & locations
Easily identified by its visible grainy texture resembling sandpaper. Found worldwide in sedimentary basins and geological strata.
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Other sedimentary specimens
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Fossiliferous Concretion
Septarian Concretion containing Brachiopods/Crinoids
fossil
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Generic Pebble / Rock Fragment
Lithic fragment / Weathered rock
sedimentary
Banded Siltstone / Mudstone Pebble
Siltstone / Argillite
sedimentary
Sedimentary Sandstone
Arenite (Sedimentary Rock)
sedimentary