sedimentary

Sandstone

Arenite (SiO2 based)

AI-generated identification · may be incorrect

Hardness: 6-7 on Mohs scale; Color: Tan, brown, reddish; Luster: Dull/Earthy; Crystal structure: Granular; Cleavage: None; Specific gravity: 2.2-2.8.

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

Identified May 12, 2026More sedimentary →

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Physical properties

Hardness: 6-7 on Mohs scale; Color: Tan, brown, reddish; Luster: Dull/Earthy; Crystal structure: Granular; 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, beaches, or deserts. Often millions of years old.

Uses & applications

Extensively used in construction as a building stone, for decorative pavers, and as a source of silica for glass manufacturing. Orally, it's a common landscaping rock.

Geological facts

Sandstone is a primary reservoir rock for groundwater and petroleum because of its high porosity and permeability. Famous structures like the treasury at Petra are carved entirely out of sandstone.

Field identification & locations

Identify by its gritty, sandpaper-like texture and visible sand grains. Found globally in basins and near continental margins. Collectors look for unique banding or fossils.