sedimentary

Sandstone

Arenite

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

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

Identified June 12, 2026More sedimentary →

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Physical properties

Hardness: 6-7 on Mohs scale; Color: Tan, brown, or grey; 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 mineral particles or rock fragments of sand size (0.0625 to 2 mm). Often found in riverbeds, deserts, or ancient ocean floors.

Uses & applications

Widely used in construction for building stone, tiles, and as a raw material for glass manufacturing. In landscaping, it is used for pavers and decorative stones.

Geological facts

Sandstone accounts for approximately 20 to 25 percent of all sedimentary rocks on Earth. Historically, it was used to build famous structures like the Treasury at Petra and the Red Fort in India.

Field identification & locations

Identify by its gritty texture (feels like sandpaper) and visible sand grains. Mostly found in areas with past or present water activity. Look for bedding layers or cross-bedding features.