sedimentary

Sandstone

Arenite (predominantly SiO2)

AI-generated identification · may be incorrect

Hardness: 6-7 Mohs; Color: Tan, brown, or buff; Luster: Dull/Earthy; Crystal Structure: Granular/Clastic; Cleavage: None; Specific Gravity: 2.2-2.8

Hardness: 6-7 Mohs
Color: Tan, brown, or buff
Luster: Dull/Earthy

Identified July 1, 2026More sedimentary →

Explore Sandstone in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Hardness: 6-7 Mohs; Color: Tan, brown, or buff; Luster: Dull/Earthy; Crystal Structure: Granular/Clastic; Cleavage: None; Specific Gravity: 2.2-2.8

Formation & geological history

Formed via the accumulation and cementation of sand-sized mineral grains or rock fragments over millions of years. This usually occurs in river deltas, beaches, or desert dunes.

Uses & applications

Widely used as a construction material for paving, masonry, and architectural cladding. Historically significant for building monuments and cathedrals.

Geological facts

Sandstone is highly porous, making it an excellent natural filter for groundwater aquifers and a common reservoir for oil and natural gas.

Field identification & locations

Identified by its gritty, sandpaper-like texture and visible layers of bedding. Found globally in areas with ancient sedimentary basins. Collectors look for specific patterns like Liesegang rings.