sedimentary

Sandstone (likely Ferruginous)

Arenite (primarily SiO2 with Fe2O3 staining)

AI-generated identification · may be incorrect

Hardness: 6-7 on Mohs scale; Color: Tan to reddish-brown; Luster: Dull/Earthy; Structure: Granular/Clastic; Cleavage: None; Specific Gravity: 2.2-2.8

Hardness: 6-7 on Mohs scale
Color: Tan to reddish-brown
Luster: Dull/Earthy

Identified June 21, 2026More sedimentary →

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Physical properties

Hardness: 6-7 on Mohs scale; Color: Tan to reddish-brown; Luster: Dull/Earthy; 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, typically quartz and feldspar, in river beds, deserts, or marine environments over millions of years.

Uses & applications

Used widely in construction for building stone, glass manufacturing, and as a reservoir rock in the petroleum industry.

Geological facts

Sandstone makes up about 10-20% of the Earth's sedimentary rocks. The famous monuments of Petra are carved entirely out of sandstone cliffs.

Field identification & locations

Identify by its gritty, sandpaper-like feel and visible grains. Commonly found in arid regions, canyon walls, and coastal cliffs. Collectors should look for unique cross-bedding patterns.