sedimentary

Sandstone

Arenite (Clastic Sedimentary Rock)

Hardness: 6-7 Mohs; Color: Brown, tan, or gray; Luster: Dull/Earthy; Crystal structure: Granular/Clastic; Cleavage: None; Grain size: 0.06 to 2 mm.

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

Identified July 14, 2026More sedimentary →

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Physical properties

Hardness: 6-7 Mohs; Color: Brown, tan, or gray; Luster: Dull/Earthy; Crystal structure: Granular/Clastic; Cleavage: None; Grain size: 0.06 to 2 mm.

Formation & geological history

Formed via the accumulation and cementation of mineral particles or rock fragments (clasts) usually composed of quartz or feldspar. Result of weathering, transport by water or wind, and lithification over millions of years.

Uses & applications

Commonly used as a building material, paving stone, and decorative landscaping rock. In industry, high-purity sandstone is used as a source of silica for glassmaking.

Geological facts

Sandstone represents about 20-25% of all sedimentary rocks on Earth. Some of the most iconic landscapes in the world, like the Grand Canyon or Petra, are primarily established within sandstone formations.

Field identification & locations

Identify in the field by its sandpaper-like texture and visible sand grains. It is extremely common worldwide in basins, deserts, and coastal areas. Collectors look for unique banding (Liesegang rings) or fossils.