sedimentary

Sandstone

Arenite

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

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

Identified July 17, 2026More sedimentary →

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Physical properties

Hardness: 6-7 on Mohs scale; Color: Tan, brown, yellow, or buff; Luster: Dull/Earthy; Structure: Clastic; 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 and feldspar, in environments like beaches, deserts, and river beds over millions of years.

Uses & applications

Extensively used as a building material, pavers, decorative stones, and as a source of quartz for glass making and abrasive manufacturing.

Geological facts

Sandstone makes up about 10 to 20 percent of all sedimentary rocks on Earth. Familiar landmarks like the Grand Canyon are composed largely of various sandstone layers.

Field identification & locations

Identify in the field by its gritty, sandpaper-like feel and visible layering or bedding planes. It is commonly found in dry, arid regions and along ancient coastlines.