sedimentary

Iron-rich breccia (hematite–goethite rock)

Hematite (Fe₂O₃) and goethite (FeO(OH)) ironstone, likely ferruginous breccia

AI-generated identification · may be incorrect

Hardness approximately 5–6.5 Mohs; reddish-brown, black, ochre, and gray; earthy to weakly metallic luster; massive, irregular texture with angular cemented fragments. High density and commonly leaves a red-brown streak; no obvious cleavage.

Identified August 15, 2026More sedimentary →

Explore Iron-rich breccia (hematite–goethite rock) 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

Formed when iron-rich fluids or weathering products cemented rock fragments, commonly in lateritic or banded iron-formation environments. The exact geological age cannot be determined from the image; such deposits range from Precambrian to recent weathering zones.

Uses & applications

Used as iron ore when sufficiently rich, and as pigment, lapidary material, or an attractive mineral specimen. It is generally not a gemstone unless polished for its contrasting colors and textures.

Geological facts

The red coloration is mainly hematite, while yellow-orange areas commonly indicate goethite or limonite. Strong magnetism, if present, may indicate associated magnetite.

Field identification & locations

Look for a red-to-yellow streak, unusually heavy weight, earthy surfaces, and possible attraction to a magnet; these tests help distinguish it from ordinary red volcanic rock. Common in iron-rich weathering zones and iron-ore districts worldwide.