sedimentary
Sandstone
Arenite (SiO2 primarily)
AI-generated identification · may be incorrectCommonly 6-7 on Mohs scale; reddish-brown, tan, or grey color; gritty, sandpaper-like texture; matte or earthy luster; clastic sedimentary structure.
Identified More sedimentary →
Explore Sandstone in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Commonly 6-7 on Mohs scale; reddish-brown, tan, or grey color; gritty, sandpaper-like texture; matte or earthy luster; clastic sedimentary structure.
Formation & geological history
Formed from the accumulation and cementation of sand-sized mineral particles or rock fragments. Often deposited in deserts, river beds, or beaches over millions of years (Paleozoic to Cenozoic eras).
Uses & applications
Widely used in construction for building stone, pavers, and decorative facades. High-purity sandstones are used in glass manufacturing and metal casting.
Geological facts
Sandstone can hold significant amounts of water or oil in its pore spaces, acting as an important aquifer or petroleum reservoir. The red color is usually due to iron oxide (hematite).
Field identification & locations
Identify by its distinct gritty feel and visible sand grains. Common in the American Southwest and various mountain ranges. Look for bedding planes or layers.
More like this
Other sedimentary specimens
Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Generic Pebble / Rock Fragment
Lithic fragment / Weathered rock
sedimentary
Sedimentary Sandstone
Arenite (Sedimentary Rock)
sedimentary
Shale (or Mudstone/Siltstone)
Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
sedimentary