sedimentary

Sandstone

Arenite (primarily SiO2)

Hardness: 6-7 on Mohs scale; Color: Tan, brown, or buff; Luster: Dull/Earthy; Crystal Structure: Clastic; Cleavage: None; Specific Gravity: 2.2-2.8. Texture is gritty like sandpaper.

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

Identified July 17, 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 on Mohs scale; Color: Tan, brown, or buff; Luster: Dull/Earthy; Crystal Structure: Clastic; Cleavage: None; Specific Gravity: 2.2-2.8. Texture is gritty like sandpaper.

Formation & geological history

Formed through the accumulation and cementation of sand-sized mineral particles or rock fragments, typically in river beds, beaches, or deserts. Can range from hundreds of millions to thousands of years old.

Uses & applications

Extensively used as a building material, paving stone, and in the production of glass and abrasives. Used in landscaping and for decorative stone carvings.

Geological facts

Sandstone can preserve fossilized footprints or ripple marks from ancient water bodies. It covers roughly 20% of Earth's sedimentary rock surface.

Field identification & locations

Identify by its gritty texture and visible sand grains. Found globally in canyon walls, coastal cliffs, and desert outcrops. For collectors, look for unique layering or banding colors.