sedimentary

Iron-rich sandstone or weathered laterite

Ferruginous sandstone; commonly quartz-rich sandstone cemented by iron oxides (hematite/goethite)

AI-generated identification · may be incorrect

Brown-orange, earthy surface with darker iron-stained bands, fine to medium clastic texture, weak layering, and irregular fractures. Likely hardness about 5–7 where quartz-rich, lower in softer weathered zones; dull to earthy luster and no obvious cleavage.

Identified September 2, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed from deposited sand later cemented by silica and iron oxides, or possibly from intense tropical weathering producing laterite. The exact age cannot be determined from the photograph; such materials range from ancient sedimentary units to young weathering profiles.

Uses & applications

Used locally as building stone, road aggregate, or decorative stone; strongly colored pieces may be collected, but this specimen has limited commercial value.

Geological facts

Iron oxidation produces the rust-red, ochre, and brown coloration. Dark vertical zones may represent fractures, bedding, or concentrated iron-rich fluids.

Field identification & locations

Look for gritty quartz grains, sedimentary layering, and a rusty streak; sandstone feels sandy and may shed grains, whereas laterite is more porous and clay-rich. Common in oxidized continental deposits and tropical weathering zones.