sedimentary

Banded Sandstone (River Pebble)

Arenite (SiO2 primarily)

AI-generated identification · may be incorrect

Hardness: 6-7 Mohs; Color: Tan, brown, and grey banding; Luster: Dull/Earthy; Texture: Granular and clastic; Cleavage: None.

Hardness: 6-7 Mohs
Color: Tan, brown, and grey banding
Luster: Dull/Earthy

Identified July 1, 2026More sedimentary →

Explore Banded Sandstone (River Pebble) in the encyclopedia →

Identify your own rocks.

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

App Store Google Play

Physical properties

Hardness: 6-7 Mohs; Color: Tan, brown, and grey banding; Luster: Dull/Earthy; Texture: Granular and clastic; Cleavage: None.

Formation & geological history

Formed through the accumulation and cementation of mineral particles or rock fragments. The distinct bands represent different layers of sediment deposition over time, often in a fluvial or deltaic environment. Its water-worn shape indicates it was tumbled in a river or stream.

Uses & applications

Primarily used as decorative landscaping stones, aquarium decor, or as pocket stones. Fine-grained sandstone is also used in construction and building facades.

Geological facts

The bands in sandstone are often called 'Liesegang rings' when they occur due to chemical precipitation, but in this case, they appear to be primary sedimentary bedding layers that indicate seasonal or environmental changes during deposition.

Field identification & locations

Identify by the visible sand-sized grains and parallel sedimentary layers. Common in riverbeds and ancient sedimentary basins worldwide. This specific specimen is valued for its unusual conical/ovoid shape and clear horizontal banding.