sedimentary

Sandstone

Arenite

AI-generated identification · may be incorrect

Hardness: 6-7 Mohs scale; Color: Tan, beige, light brown; Luster: Dull/Earthy; Crystal structure: Granular texture of sand-sized grains (mostly quartz); Cleavage: None; Specific gravity: 2.2-2.8

Hardness: 6-7 Mohs scale
Color: Tan, beige, light brown
Luster: Dull/Earthy

Identified June 23, 2026More sedimentary →

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Physical properties

Hardness: 6-7 Mohs scale; Color: Tan, beige, light brown; Luster: Dull/Earthy; Crystal structure: Granular texture of sand-sized grains (mostly quartz); 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, typically in river beds, deserts, or coastal environments over millions of years.

Uses & applications

Used widely in construction for paving and building facades, as a reservoir rock for oil and gas, and as a natural material for decorative landscaping.

Geological facts

Sandstone makes up about 10-25% of all sedimentary rocks on Earth. The famous red rock formations in Sedona, Arizona and the Grand Canyon are primarily composed of colored sandstone layers.

Field identification & locations

Identify by its gritty texture (feels like sandpaper) and visible layering (bedding). Commonly found in dry regions, canyons, and coastal cliffs. Look for cross-bedding patterns which indicate ancient wind or water currents.