sedimentary

Sandstone

Arenite (SiO2 dominated sandstone)

Hardness: 6-7 (variable depending on cementation); Color: Buff, tan, brownish-orange; Luster: Dull to earthy; Texture: Clastic, medium-grained feel like sandpaper; Composition: Predominantly quartz grains with clay/iron oxide binder.

Hardness: 6-7 (variable depending on cementation)
Color: Buff, tan, brownish-orange
Luster: Dull to earthy

Identified July 25, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the compaction and cementation of sand-sized mineral grains or rock fragments, typically in desert, river bed, or beach depositional environments over millions of years.

Uses & applications

Used extensively as a building material, paving, landscaping stone, and in the production of glass and abrasives.

Geological facts

Sandstone records ancient environmental conditions such as wind directions in fossil sand dunes (cross-bedding) and ripple marks from ancient shorelines or rivers.

Field identification & locations

Identified by its granular feel resembling sandpaper and visible sand-sized grains. Extremely common worldwide in sedimentary basins, cliffs, and riverbanks. Common field specimen with negligible monetary value.