sedimentary

Sandstone

Arenite (SiO2 principal)

Hardness: 6-7 Mohs; Color: Tan, brown, or buff; Luster: Dull/Earthy; Texture: Granular, sandpaper-like feel; Cleavage: None; Structure: Massive or bedded

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

Identified April 19, 2026More sedimentary →

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Physical properties

Hardness: 6-7 Mohs; Color: Tan, brown, or buff; Luster: Dull/Earthy; Texture: Granular, sandpaper-like feel; Cleavage: None; Structure: Massive or bedded

Formation & geological history

Formed by the accumulation and lithification of sand-sized mineral grains or rock fragments, typically through pressure and mineral cements like silica or calcium carbonate in river beds or desert environments.

Uses & applications

Extensively used as a building material, in decorative masonry, as an abrasive for sharpening, and as a reservoir rock for oil and gas.

Geological facts

Sandstone is highly porous, making it an excellent aquifer for groundwater storage. It is responsible for some of the world's most dramatic landscapes, such as the Grand Canyon and Antelope Canyon.

Field identification & locations

Identified by its gritty texture (feels like sandpaper) and visible sand grains. Found globally in basins and near old river deltas. Common in many regional geological formations.