sedimentary

Weathered sandstone

Quartz-rich sandstone (lithified arenite)

AI-generated identification · may be incorrect

Typically Mohs hardness 6–7 for quartz grains, tan to brown color, dull to earthy luster, and visibly granular texture; bedding or iron-oxide staining may occur. Cleavage is absent, and density is commonly about 2.2–2.7 g/cm³.

Identified August 15, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed when sand-sized mineral grains accumulated, were compacted, and cemented by silica, calcite, or iron oxides. The image does not reveal a specific geological age; sandstone ranges from Precambrian to modern formations.

Uses & applications

Used as building stone, paving, aggregate, and historically for monuments; attractive varieties are used decoratively. This ordinary weathered fragment has little jewelry value.

Geological facts

Quartz grains commonly dominate, while feldspar, rock fragments, and iron oxides create color variation. Its rough, granular break distinguishes it from many massive igneous rocks.

Field identification & locations

Common worldwide in deserts, river channels, beaches, and sedimentary basins. Confirm by rubbing the gritty surface, looking for sand grains or bedding, and testing for weak fizz with dilute acid if carbonate cement is suspected.