sedimentary

Sandstone

Arenite

Hardness: 6-7 on Mohs scale; Color: Tan, beige, or grey with black specks; Luster: Dull/Earthy; Texture: Clastic, sandy feel; Structure: Massive or bedded.

Hardness: 6-7 on Mohs scale
Color: Tan, beige, or grey with black specks
Luster: Dull/Earthy

Identified July 18, 2026More sedimentary →

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Physical properties

Hardness: 6-7 on Mohs scale; Color: Tan, beige, or grey with black specks; Luster: Dull/Earthy; Texture: Clastic, sandy feel; Structure: Massive or bedded.

Formation & geological history

Formed through the accumulation and cementation of sand-sized mineral grains or rock fragments, typically occurring in riverbeds, deserts, or coastal environments over millions of years.

Uses & applications

Widely used as a construction material, for architectural facades, paving stones, and as an abrasive in industrial manufacturing.

Geological facts

Sandstone can preserve fossil footprints and ripple marks from ancient environments; it makes up about 20% of all sedimentary rocks on Earth.

Field identification & locations

Identify by its gritty, sandpaper-like texture. Common in regions with ancient sedimentary basins. Collectors often look for unique erosion patterns or fossil inclusions.