sedimentary

Sandstone

Arenite (SiO2 primarily)

Hardness: 6-7 (on Mohs scale if quartz-rich), Color: Brownish-red to tan, Luster: Dull or earthy, Crystal structure: Clastic (granular), Cleavage: None, Specific gravity: 2.2-2.8

Identified June 19, 2026More sedimentary →

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Physical properties

Hardness: 6-7 (on Mohs scale if quartz-rich), Color: Brownish-red to tan, Luster: Dull or earthy, Crystal structure: Clastic (granular), Cleavage: None, Specific gravity: 2.2-2.8

Formation & geological history

Formed through the accumulation and cementation of sand-sized mineral grains or rock fragments, typically in river beds, beaches, or deserts over millions of years.

Uses & applications

Commonly used in construction for building stone, road base, and as a raw material for glass manufacturing or as a landscaping material.

Geological facts

Sandstone can preserve ancient fossilized ripples from water or sand dunes, providing a record of prehistoric wind and water patterns.

Field identification & locations

Identify by its gritty, sandpaper-like texture and visible sand grains. Found globally in sedimentary basins; look for layered outcrops or riverbed deposits.