sedimentary

Reddish sandstone

Quartz-rich sandstone, likely ferruginous sandstone (quartz grains cemented by iron oxides)

AI-generated identification · may be incorrect

Orange-red, rough and granular with a dull luster; likely dominated by quartz (Mohs 7) and iron-oxide cement. Individual grains and exact hardness are not clear from the image; sandstone has no consistent crystal structure or cleavage.

Identified October 13, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed when sand was compacted and cemented, with iron oxides producing the red coloration. Its age and depositional environment cannot be determined from the image.

Uses & applications

Sandstone is used as building and paving stone, aggregate, and decorative stone; this loose specimen is mainly suitable for collecting.

Geological facts

Iron oxides such as hematite commonly stain sandstone red or orange.

Field identification & locations

Look for visible sand-sized grains and a gritty texture; a fresh surface may scratch glass if quartz-rich. Sandstone occurs worldwide in ancient river, desert, beach, and shallow-marine deposits.