sedimentary

Weathered sandstone pebble

Quartz-rich sandstone, likely ferruginous sandstone

AI-generated identification · may be incorrect

Fine-grained, tan-brown, dull to slightly gritty surface; composed mainly of quartz with feldspar, clay, and iron-oxide cement. Typical hardness is about 6–7 for individual grains, but the rock is relatively friable; no visible crystals or cleavage.

Identified August 30, 2026More sedimentary →

Explore Weathered 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 deposited, compacted, and cemented, commonly in river, dune, or shallow-marine settings. Its exact geological age cannot be determined from the photograph; surface weathering has rounded and darkened the specimen.

Uses & applications

Used as building stone, paving, aggregate, and occasionally decorative stone; this small weathered piece has primarily educational or modest collecting value.

Geological facts

Iron oxides produce the rusty brown coloration, while differential weathering can create the tapered, pebble-like shape.

Field identification & locations

Identify it by its gritty texture, visible sand grains, earthy tan color, and tendency to scratch glass only if strongly quartz-rich. Common worldwide in sedimentary terrains, stream beds, deserts, and eroding sandstone outcrops.