sedimentary

Sandstone

Arenite (SiO2 principal)

AI-generated identification · may be incorrect

Hardness: 6-7 Mohs; Color: Tan, brown, or buff; Luster: Dull/Earthy; Crystal structure: Granular clastic; Texture: Gritty like sandpaper; Specific gravity: 2.2-2.8.

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

Identified April 3, 2026More sedimentary →

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Physical properties

Hardness: 6-7 Mohs; Color: Tan, brown, or buff; Luster: Dull/Earthy; Crystal structure: Granular clastic; Texture: Gritty like sandpaper; Specific gravity: 2.2-2.8.

Formation & geological history

Formed via the accumulation and cementation of sand-sized mineral particles or rock fragments, typically in desert, river, or coastal environments. Can range from Paleozoic to Cenozoic in age.

Uses & applications

Extensively used in construction, paving, as a source for glass-making (high silica varieties), and as a reservoir rock for oil and natural gas.

Geological facts

Sandstone is highly porous and serves as a major aquifer for groundwater. It often preserves fossils and ripple marks from ancient shorelines.

Field identification & locations

Identify by its sandy, gritty feel when rubbed; it will not fizz with acid unless carbonate cement is present. Commonly found in canyonlands and exposed plateaus.