sedimentary
Sandstone
Arenite (Siliclastic sedimentary rock)
Hardness: 6-7 (Mohs scale), Color: tan, buff, or brown, Luster: dull/earthy, Crystal Structure: clastic (sand-sized grains), Cleavage: none, Specific Gravity: 2.2-2.8
Identified More sedimentary →
Explore Sandstone in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 6-7 (Mohs scale), Color: tan, buff, or brown, Luster: dull/earthy, Crystal Structure: clastic (sand-sized grains), Cleavage: none, Specific Gravity: 2.2-2.8
Formation & geological history
Formed through the accumulation and cementation of sand-sized mineral grains or rock fragments, typically within desert, river, or coastal environments over millions of years.
Uses & applications
Widely used for construction, decorative stone, road aggregate, and as a reservoir rock for oil, gas, and groundwater.
Geological facts
Sandstone represents about 20-25% of all sedimentary rocks in the Earth's crust. It often preserves cross-bedding and ripple marks from ancient environments.
Field identification & locations
Identify by the sandpaper-like feel and visible grains. Common in sedimentary basins and canyons; collectors look for specimens with unique iron staining or fossil remains.
More like this
Other sedimentary specimens
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Fossiliferous Concretion
Septarian Concretion containing Brachiopods/Crinoids
fossil
Shale
Shale (clastic sedimentary rock)
sedimentary
Brown Sandstone (River Rock)
Arenite
sedimentary
Shale
Argillaceous sedimentary rock
sedimentary
Mudstone
Argillite / Siliciclastic sedimentary rock
sedimentary