sedimentary

Sandstone

Arenite (SiO2 primarily)

Mohs hardness: 6-7 (approx.), Color: tan to yellowish-brown, Luster: dull/earthy, Structure: clastic/granular texture with visible sand grains, Cleavage: none, Specific Gravity: 2.2-2.8

Hardness: 6-7 (approx

Identified February 5, 2026More sedimentary →

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Physical properties

Mohs hardness: 6-7 (approx.), Color: tan to yellowish-brown, Luster: dull/earthy, Structure: clastic/granular texture with visible sand grains, Cleavage: none, Specific Gravity: 2.2-2.8

Formation & geological history

Formed from the accumulation of sand-sized mineral particles or rock fragments in environments like deserts, river deltas, or beaches. It undergoes lithification (compaction and cementation) over millions of years.

Uses & applications

Used extensively in construction for cladding, paving, and decorative stonework. Historically used for sharpening tools and as a building material for iconic monuments.

Geological facts

Sandstone can preserve fossilized footprints or ripple marks from ancient water currents. It acts as an important reservoir for groundwater, oil, and natural gas due to its porosity.

Field identification & locations

Identify by its gritty texture (feels like sandpaper) and visible bedding planes. Common in arid regions and canyon landscapes. Collectors look for unique banding or fossil inclusions.