sedimentary

Sandstone

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

AI-generated identification · may be incorrect

Tan-brown, rough and granular, with sand-sized grains cemented together; likely composed mainly of quartz and feldspar. Hardness and specific gravity vary with grain composition and cement; the white sphere is not part of the rock.

Identified October 15, 2026More sedimentary →

Explore 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

Forms when deposited sand is compacted and cemented, commonly in rivers, deserts, beaches, or shallow seas. Its age cannot be determined from appearance alone.

Uses & applications

Used as building and paving stone, landscaping material, and sometimes as a reservoir rock for groundwater or hydrocarbons.

Geological facts

Sandstone properties vary substantially with grain size, mineral content, and cement, which may be silica, calcite, or iron oxides.

Field identification & locations

Identify by its visible sand-sized grains and gritty texture; examine a fresh surface to distinguish grains and cement. Found worldwide in sedimentary basins.