sedimentary

Sandstone

Arenite (composed of SiO2, CaCO3, or iron oxides)

AI-generated identification · may be incorrect

Hardness: 6-7 on Mohs scale (if quartz-rich); Color: Tan, beige, or light brown; Luster: Dull/Earthy; Crystal structure: Clastic texture; Cleavage: None; Specific gravity: 2.2-2.8

Hardness: 6-7 on Mohs scale (if quartz-rich)
Color: Tan, beige, or light brown
Luster: Dull/Earthy

Identified June 26, 2026More sedimentary →

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Physical properties

Hardness: 6-7 on Mohs scale (if quartz-rich); Color: Tan, beige, or light brown; Luster: Dull/Earthy; Crystal structure: Clastic texture; Cleavage: None; Specific gravity: 2.2-2.8

Formation & geological history

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

Uses & applications

Extensively used in construction for paving, building facades, and as a source of high-purity silica for glass manufacturing.

Geological facts

Sandstone can preserve fossilized footprints or ripple marks from ancient riverbeds, providing a 'snapshot' of environmental conditions from millions of years ago.

Field identification & locations

Identify by its gritty, sandpaper-like feel and visible grains. Commonly found in canyons, riverbeds, and sedimentary basins worldwide. Popular for garden landscaping.