sedimentary

Sandstone

Arenite (SiO2 principal)

Hardness: 6-7 (individual grains); Color: Tan, beige, light brown; Luster: Dull, earthy; Crystal structure: Granular clastic; Specific gravity: 2.2-2.8

Hardness: 6-7 (individual grains)
Color: Tan, beige, light brown
Luster: Dull, earthy

Identified July 19, 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 (individual grains); Color: Tan, beige, light brown; Luster: Dull, earthy; Crystal structure: Granular clastic; Specific gravity: 2.2-2.8

Formation & geological history

Formed through the cementation of sand-sized mineral particles or rock fragments. Typically deposited in environments like deserts, river deltas, or beaches over millions of years.

Uses & applications

Primary use in construction as a building material, decorative paving, and as a reservoir rock for oil and natural gas in the energy sector.

Geological facts

Sandstone can be very porous, acting as a natural filter and aquifer for water. It often preserves fossils and ripple marks from ancient environments.

Field identification & locations

Identify in the field by its gritty, sandpaper-like texture. Commonly found in canyons, cliffs, and sedimentary basins. If it scratches glass, it contains high quartz content.