sedimentary

Sandstone

Arenite (composed primarily of Quartz, SiO2)

AI-generated identification · may be incorrect

Hardness: 6-7 (Mohs scale); Color: Brown, reddish-tan, or buff; Luster: Dull/Earthy; Crystal structure: Granular clastic; Cleavage: None; Specific gravity: 2.2-2.8

Hardness: 6-7 (Mohs scale)
Color: Brown, reddish-tan, or buff
Luster: Dull/Earthy

Identified April 30, 2026More sedimentary →

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Physical properties

Hardness: 6-7 (Mohs scale); Color: Brown, reddish-tan, or buff; Luster: Dull/Earthy; Crystal 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. Usually deposited in desert, river, or coastal environments over millions of years (clastic lithification).

Uses & applications

Used widely as a building material, in the manufacture of glass (when high purity quartz), as grinding stones, and for landscaping.

Geological facts

Sandstone makes up about 20-25% of all sedimentary rocks on Earth. Its porous nature makes it an excellent reservoir for groundwater, oil, and natural gas.

Field identification & locations

Identify by its gritty, sandpaper-like texture. It is commonly found in desert regions, canyons, and near ancient shorelines. Look for visible layers (bedding) in larger outcroppings.