sedimentary

Sandstone

Arenite (Clastic Sedimentary Rock)

Hardness: 6-7 Mohs; Color: Tan, beige, or light brown; Luster: Dull/Earthy; Crystal structure: Granular/Clastic; Specific Gravity: 2.2-2.8. Usually has a gritty, sandpaper-like texture.

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

Identified July 18, 2026More sedimentary →

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Physical properties

Hardness: 6-7 Mohs; Color: Tan, beige, or light brown; Luster: Dull/Earthy; Crystal structure: Granular/Clastic; Specific Gravity: 2.2-2.8. Usually has a gritty, sandpaper-like texture.

Formation & geological history

Formed over millions of years by the accumulation and lithification of sand-sized mineral grains (usually quartz and/or feldspar) in environments like deserts, river deltas, or beaches.

Uses & applications

Used extensively in construction as a building material, paving stones, and for manufacturing glass or abrasive materials.

Geological facts

Sandstone is highly porous and often acts as a natural aquifer or a reservoir for oil and natural gas. Some sandstones preserve spectacular fossil footprints or ripple marks from ancient currents.

Field identification & locations

Identify by its sandy texture and visible grains. It is extremely common worldwide and can be found in mountain ranges and near coastal areas. Use a magnifying glass to see the rounded grains and checking if it can scratch glass.