sedimentary

Reddish sandstone fragment

Quartz-rich sandstone (likely iron-oxide stained; exact composition cannot be confirmed visually)

AI-generated identification · may be incorrect

Rough, granular, pinkish-red surface with no visible crystals or cleavage. Typical sandstone hardness varies with cementation; quartz grains are Mohs 7, while the specimen may crumble more easily.

Identified October 5, 2026More sedimentary →

Explore Reddish sandstone fragment in the encyclopedia →

Identify your own rocks.

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

App Store Google Play

Physical properties

Rough, granular, pinkish-red surface with no visible crystals or cleavage. Typical sandstone hardness varies with cementation; quartz grains are Mohs 7, while the specimen may crumble more easily.

Formation & geological history

Formed when sand grains—commonly quartz—were compacted and cemented, with iron oxides producing the red color. Sandstones occur in many geological ages and environments, including deserts, river channels, and shorelines.

Uses & applications

Sandstone is used as building and paving stone, aggregate, and decorative material; this small fragment has little practical or commercial value.

Geological facts

The red hue commonly comes from hematite or other iron-oxide coatings between grains.

Field identification & locations

Look for visible sand-sized grains and a gritty texture; a fresh surface may reveal individual grains. Common worldwide, but its precise source cannot be identified from the image.