sedimentary

Likely iron-rich concretion or weathered rock pebble

Uncertain from the image; possibly an iron-oxide-cemented concretion (goethite/hematite)

AI-generated identification · may be incorrect

Rounded, opaque, dull reddish-brown specimen with pale streaks; hardness, crystal structure, cleavage, and specific gravity cannot be determined reliably from the photo.

Identified September 25, 2026More sedimentary →

Explore Likely iron-rich concretion or weathered rock pebble in the encyclopedia →

Identify your own rocks.

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

App Store Google Play

Physical properties

Rounded, opaque, dull reddish-brown specimen with pale streaks; hardness, crystal structure, cleavage, and specific gravity cannot be determined reliably from the photo.

Formation & geological history

Could have formed as iron oxides cemented sediment grains or replaced material during groundwater movement; age and formation setting are unknown.

Uses & applications

No specific industrial or jewelry use can be established; similar material is mainly collected as a curiosity or geological specimen.

Geological facts

Iron-rich concretions can develop rounded shapes and banding, but surface appearance alone is not enough to distinguish them from other rocks or minerals.

Field identification & locations

The photo shows a small, rounded brown object, but scale, texture, and diagnostic features are unclear; inspect a fresh surface and test hardness or streak for identification.