sedimentary

Reddish-brown sandstone pebble

Quartz-rich sandstone, likely ferruginous sandstone

AI-generated identification · may be incorrect

Composed mainly of quartz grains with iron-oxide cement; typically Mohs hardness 6–7 for grains but friable as a rock, matte to slightly granular luster, earthy red-brown color, and no consistent cleavage. The visible rough, granular texture and rounded shape fit a weathered sandstone pebble.

Identified August 24, 2026More sedimentary →

Explore Reddish-brown sandstone pebble in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Formed when sand was lithified by compaction and cementation, with hematite or limonite producing the reddish color; its exact geological age cannot be determined from the image. Rounding indicates transport by water or sediment.

Uses & applications

Used as building stone, paving and landscaping aggregate, and occasionally as a decorative specimen; this small common pebble has minimal commercial value.

Geological facts

Iron-rich sandstone commonly records oxidizing continental or shallow-marine environments. Sandstone can preserve ripple marks, cross-bedding, fossils, and ancient wind or water-flow directions.

Field identification & locations

Identify it by visible sand grains, earthy red coloration, lack of crystals, and possible scratching or crumbling along edges; common worldwide, especially in sedimentary basins and stream gravels.