sedimentary

Sandstone

Arenite

AI-generated identification · may be incorrect

Hardness: 6-7 on Mohs scale; Color: Tan, brown, or buff; Luster: Dull to earthy; Structure: Granular/clastic texture; Cleavage: None; Specific Gravity: 2.2-2.8

Hardness: 6-7 on Mohs scale
Color: Tan, brown, or buff
Luster: Dull to earthy

Identified June 29, 2026More sedimentary →

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Physical properties

Hardness: 6-7 on Mohs scale; Color: Tan, brown, or buff; Luster: Dull to earthy; Structure: Granular/clastic texture; Cleavage: None; Specific Gravity: 2.2-2.8

Formation & geological history

Formed through the accumulation and cementation of mineral particles or rock fragments (0.0625 to 2 mm size), typically in river beds, beaches, or deserts over millions of years.

Uses & applications

Widely used as a construction material for paving, walls, and decorative finishes; also used in glass manufacturing and as a reservoir rock for oil and gas.

Geological facts

Sandstone makes up about 10-25% of all sedimentary rocks on Earth. The famous red rock formations of the American Southwest are composed primarily of varied sandstone layers.

Field identification & locations

Identify by its gritty, sandpaper-like feel and visible grains. Often found in layered outcroppings or near ancient waterways. Collectors look for unique banding or fossil inclusions.