sedimentary

Weathered quartz-rich sandstone

Quartz arenite to arkosic sandstone, predominantly SiO₂ with possible feldspar and iron-oxide cement

AI-generated identification · may be incorrect

Granular, pale cream to reddish-brown, and dull to slightly sugary; individual sand grains are visible, with moderate hardness around Mohs 6–7 and no obvious cleavage. The rusty coloration likely comes from hematite or limonite cement; porosity and density vary widely.

Identified August 23, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed when sand accumulated, was compacted, and cemented—likely in a river, beach, dune, or shallow-marine setting. Its exact geological age cannot be determined from the photograph; weathering has rounded and stained the exposed surface.

Uses & applications

Commonly used as building stone, paving, aggregate, and decorative stone; attractive varieties are used for architectural cladding and landscaping. This ordinary hand specimen has little commercial value.

Geological facts

Sandstone’s texture records the transport and depositional history of its grains; well-rounded grains suggest longer transport, while angular grains indicate nearby sources. Iron-oxide staining can produce dramatic red, orange, and brown patterns.

Field identification & locations

Identify it by visible sand-sized grains, gritty texture, and layered or porous fabric; a steel nail should not easily scratch quartz-rich grains, while the rock may shed sand when weathered. Common worldwide, especially in sedimentary basins and deserts; estimated value is about $1–$10 for a hand specimen, or $10–$50 if unusually attractive.