sedimentary

Weathered sandstone

Quartz-rich sandstone (composition cannot be confirmed from the image)

AI-generated identification · may be incorrect

Tan to reddish-brown, dull, rough, and apparently fine- to medium-grained; likely dominated by quartz, with possible feldspar and iron-oxide cement. Quartz has Mohs hardness 7; the intact rock’s hardness and specific gravity depend on cement and grain composition.

Identified October 8, 2026More sedimentary →

Explore Weathered sandstone 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

Sand grains compacted and cemented in a sedimentary environment, then exposed to weathering; the specimen’s age and original depositional setting cannot be determined visually.

Uses & applications

Sandstone is widely used as building and paving stone, aggregate, and ornamental stone; this unprepared piece has little commercial value.

Geological facts

Iron oxides commonly give sandstone its rusty tan or reddish color. A hand lens can reveal individual sand grains and cement.

Field identification & locations

Likely sandstone, based on its earthy color and granular, uneven surface; confirm by inspecting grains or testing a fresh edge. Sandstone occurs worldwide in sedimentary basins; similar loose specimens typically sell for about $0–$10 USD.