sedimentary

Weathered sandstone

Quartz-rich sandstone, primarily SiO₂ with variable feldspar, mica, and clay minerals

AI-generated identification · may be incorrect

Typically Mohs hardness 6–7 for quartz-rich grains, tan to brown color, dull to earthy luster, granular texture, and no consistent cleavage. The specimen appears strongly weathered and may contain iron-oxide staining or clay-rich cement.

Identified August 24, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed when sand-sized sediment accumulated, compacted, and cemented, commonly in rivers, dunes, beaches, or shallow marine settings. Its precise geological age cannot be determined from the image; weathering has altered the exposed surface.

Uses & applications

Used as building stone, paving, aggregate, and occasionally as a decorative material; low-grade fragments have little jewelry value.

Geological facts

Sandstone often preserves cross-bedding, ripple marks, fossils, or rounded quartz grains, though these features are not clearly visible here.

Field identification & locations

Identify it by visible sand grains, gritty texture, and layered or porous structure; a glass scratch test may show quartz grains scratching glass. Common worldwide, especially in sedimentary basins and arid regions.