sedimentary

Sandstone (likely Arkose or Quartz Sandstone)

Clastic sedimentary rock (primarily SiO2)

AI-generated identification · may be incorrect

Hardness: 6-7 Mohs; Color: Brown, tan, or reddish-brown; Luster: Dull/Earthy; Crystal structure: Granular/Clastic; Cleavage: None; Specific gravity: 2.2-2.8

Hardness: 6-7 Mohs
Color: Brown, tan, or reddish-brown
Luster: Dull/Earthy

Identified June 21, 2026More sedimentary →

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Physical properties

Hardness: 6-7 Mohs; Color: Brown, tan, or reddish-brown; Luster: Dull/Earthy; Crystal structure: Granular/Clastic; 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 over millions of years, typically in river beds, beaches, or deserts.

Uses & applications

Used widely in construction and masonry, as a decorative building stone, and historically as grindstones for sharpeners.

Geological facts

Sandstone often preserves fossils and ripple marks from ancient water currents, providing a 'snapshot' of Earth's ancient environments.

Field identification & locations

Identify by its gritty, sandpaper-like texture. It common in areas with exposed sedimentary basins. For collectors, look for unique colors or fossil inclusions.