sedimentary

Sandstone (with Chert/Quartzite)

Arenite (primarily SiO2)

AI-generated identification · may be incorrect

Hardness: 6-7 Mohs; Color: Tan, brown, and grey; Luster: Dull to earthy; Crystal structure: Granular/Clastic; Cleavage: None; Specific gravity: 2.2-2.8

Hardness: 6-7 Mohs
Color: Tan, brown, and grey
Luster: Dull to earthy

Identified May 28, 2026More sedimentary →

Explore Sandstone (with Chert/Quartzite) 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, and grey; Luster: Dull to earthy; Crystal structure: Granular/Clastic; Cleavage: None; Specific gravity: 2.2-2.8

Formation & geological history

Formed through the accumulation and cementation of mineral particles or rock fragments (clasts) that have been transported by water, wind, or ice. Often found in riverbeds, deserts, and coastal environments.

Uses & applications

Used widely in construction for building stone and road base. Fine-grained variants are used for grindstones. Higher silica types are used in glass manufacturing.

Geological facts

Sandstone records the history of Earth's surface environments; the layers can indicate ancient wind patterns or water currents. Some of the world's most famous canyons, like the Grand Canyon, are primarily carved through sandstone.

Field identification & locations

Identify by its gritty texture (feels like sandpaper) and visible grains. It may leave a sandy residue when rubbed. Common in sedimentary basins worldwide.