sedimentary

Sandstone (likely Arkosic or Quartzose)

Sandstone (SiO2 dominated)

AI-generated identification · may be incorrect

Hardness: 6-7 Mohs; Color: Tan, brownish-grey; Luster: Dull/Earthy; Crystal Structure: Clastic (grains); Cleavage: None; Specific Gravity: 2.2-2.8

Hardness: 6-7 Mohs
Color: Tan, brownish-grey
Luster: Dull/Earthy

Identified April 3, 2026More sedimentary →

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Physical properties

Hardness: 6-7 Mohs; Color: Tan, brownish-grey; Luster: Dull/Earthy; Crystal Structure: Clastic (grains); Cleavage: None; Specific Gravity: 2.2-2.8

Formation & geological history

Formed from the accumulation and cementation of sand-sized mineral grains or rock fragments. Typically deposited in riverbeds, deserts, or coastal environments over millions of years through lithification.

Uses & applications

Used widely as a building material, in the manufacturing of glass, for road construction as aggregate, and occasionally for filtration systems.

Geological facts

Sandstone records historical environmental changes; the layers can indicate ancient wind patterns or water currents. Some of the world's most famous natural arches and canyons are carved from sandstone.

Field identification & locations

Identify in the field by its gritty texture (feels like sandpaper). Often found in outcrop layers called strata. Commonly found in basins or arid regions like the American Southwest.