sedimentary

Sandstone

Arenite

Hardness: 6-7 on Mohs scale; Color: Gray, tan, or brown; Luster: Dull/Earthy; Structure: Granular/Clastic; Cleavage: None; Specific Gravity: 2.2-2.8

Hardness: 6-7 on Mohs scale
Color: Gray, tan, or brown
Luster: Dull/Earthy

Identified June 22, 2026More sedimentary →

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Physical properties

Hardness: 6-7 on Mohs scale; Color: Gray, tan, or brown; Luster: Dull/Earthy; Structure: Granular/Clastic; Cleavage: None; Specific Gravity: 2.2-2.8

Formation & geological history

Formed through the accumulation and cementation of sand-sized mineral grains or rock fragments (clasts). Common in river deltas, deserts, and beaches over millions of years.

Uses & applications

Widely used as a construction material (building stone), as an abrasive in grinding, and as a reservoir rock for groundwater and petroleum.

Geological facts

Sandstone makes up about 10-25% of all sedimentary rocks on Earth. Famous landmarks like the Grand Canyon are primarily composed of various layers of sandstone.

Field identification & locations

Identify by its gritty texture (feels like sandpaper) and visible layering. It is commonly found in sedimentary basins and near eroding mountains or ancient shorelines.