sedimentary

Sandstone

Arenite (primarily Quartz chemical formula SiO2)

AI-generated identification · may be incorrect

Hardness: 6-7 (Mohs scale); Color: tan, yellow, or grey; Luster: dull to earthy; Structure: clastic texture with visible sand grains; Cleavage: none; Specific gravity: 2.1 to 2.8.

Hardness: 6-7 (Mohs scale)
Color: tan, yellow, or grey
Luster: dull to 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 (Mohs scale); Color: tan, yellow, or grey; Luster: dull to earthy; Structure: clastic texture with visible sand grains; Cleavage: none; Specific gravity: 2.1 to 2.8.

Formation & geological history

Formed from the accumulation and cementation of sand-sized mineral grains or rock fragments, typically through hydraulic action in rivers, lakes, or oceans over millions of years.

Uses & applications

Commonly used as a building material, paving stone, and for decorative masonry. It is also an important aquifer and reservoir rock for oil and gas.

Geological facts

Sandstone makes up about 10-25% of all sedimentary rocks found on Earth. It is famous for forming dramatic landscapes like the Grand Canyon and Antelope Canyon.

Field identification & locations

Identified by its 'sand-paper' feel and visible layers (bedding). In the field, look for grainy texture and porous surface that may absorb water slightly.