sedimentary

Weathered quartz-rich sandstone or granitic rock

Indeterminate; likely iron-stained quartz sandstone, possibly weathered granite

AI-generated identification · may be incorrect

Coarse, pale pink-brown matrix with abundant white quartz/feldspar grains and rusty iron-oxide staining; apparently massive and weathered. Estimated Mohs hardness 6–7 for quartz-rich portions; luster mostly dull to sugary, with no clearly visible crystal structure or cleavage.

Identified August 8, 2026More sedimentary →

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Physical properties

Formation & geological history

If sandstone, it formed by burial and cementation of quartz-rich sediment, commonly during the Paleozoic–Mesozoic; if granite, it crystallized slowly from magma at depth. The exposed surface shows prolonged chemical and physical weathering.

Uses & applications

Comparable material is used as crushed aggregate, building stone, landscaping rock, or decorative stone; this specimen has little jewelry value.

Geological facts

The rounded, granular texture and iron staining suggest sandstone, while scattered coarse pale crystals could indicate decomposed granite. A fresh broken surface and acid test would help distinguish them.

Field identification & locations

Common in weathered outcrops and landscaping materials worldwide. Look for sand-sized grains and bedding for sandstone; interlocking quartz and feldspar crystals for granite. Estimated value: $0–$10 as an ordinary loose specimen.