sedimentary

Sandstone

Arenite

Hardness: 6-7 Mohs; Color: Tan, brown, or pink; Luster: Dull/Earthy; Crystal Structure: Clastic texture with sand-sized grains; Cleavage: None; Specific Gravity: 2.2-2.8

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

Identified April 29, 2026More sedimentary →

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Physical properties

Hardness: 6-7 Mohs; Color: Tan, brown, or pink; Luster: Dull/Earthy; Crystal Structure: Clastic texture with sand-sized grains; Cleavage: None; Specific Gravity: 2.2-2.8

Formation & geological history

Formed through the accumulation and cementation of mineral particles or rock fragments (clasts) typically in desert, river, or ocean environments over millions of years.

Uses & applications

Used widely in construction for building stone, paving, and decorative facades. High-quality sandstone is used for manufacturing glass and as a reservoir rock in the petroleum industry.

Geological facts

Sandstone represents about 20% of all sedimentary rocks on Earth. It is porous enough to act as a significant aquifer, storing groundwater that many communities rely on.

Field identification & locations

Identify by its gritty texture (feels like sandpaper) and visible layering (bedding). It is found worldwide in sedimentary basins; look for it in cliffs, canyons, and outcrops.