sedimentary

Sandstone

Arenite

Hardness: 6-7 Mohs; Color: Brown, tan, reddish-yellow; Luster: Dull, earthy; Structure: Clastic, fine to medium-grained; Cleavage: None; Specific Gravity: 2.2-2.8.

Hardness: 6-7 Mohs
Color: Brown, tan, reddish-yellow
Luster: Dull, earthy

Identified July 17, 2026More sedimentary →

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Physical properties

Hardness: 6-7 Mohs; Color: Brown, tan, reddish-yellow; Luster: Dull, earthy; Structure: Clastic, fine to medium-grained; Cleavage: None; Specific Gravity: 2.2-2.8.

Formation & geological history

Formed from the accumulation and cementation of sand-sized mineral particles or rock fragments, typically quartz or feldspar, over millions of years in desert, river, or ocean environments.

Uses & applications

Used extensively in construction as a building material, paving stones, and for decorative architectural features; also used in glass manufacturing if the quartz content is high.

Geological facts

Sandstone can store large quantities of ground water or petroleum because it's porous and permeable. Many of the world's most famous rock formations like those in the Grand Canyon are made of sandstone.

Field identification & locations

Identify in the field by its gritty, sandpaper-like feel and visible layering (stratification). Common in desert regions and coastal sedimentary basins.