sedimentary

Banded sandstone

Quartz-rich sandstone, likely with iron-oxide staining

AI-generated identification · may be incorrect

Matte, fine-grained cream, tan, and reddish-brown layers; grains appear cemented together. Typically Mohs hardness 6–7, with quartz as the main mineral; crystal structure is not visible to the naked eye. The image does not allow a reliable hardness or mineral test.

Identified October 12, 2026More sedimentary →

Explore Banded 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

Sandstone forms when deposited sand is compacted and cemented, often in rivers, deserts, or coastal settings. The colored bands may reflect changes in sediment or iron-oxide content; its age cannot be determined from the image.

Uses & applications

Sandstone is used as building and paving stone, and as a source of sand for construction. This small specimen is mainly suitable for collecting or display.

Geological facts

The contrasting bands record changes in sediment composition or conditions during deposition; iron oxides commonly create brown and red hues.

Field identification & locations

Look for visible or gritty sand-sized grains and layered color bands; a magnifier can help confirm the grains. Sandstone occurs worldwide, but the specimen’s exact locality is unknown.