sedimentary

Likely weathered brown rock fragment

Indeterminate; possibly iron-oxide-stained sandstone or laterite

AI-generated identification · may be incorrect

Brown, dull to earthy luster, irregular granular surface, and no clearly visible crystal faces or cleavage. Hardness cannot be reliably determined from the photograph; likely about 3–7 Mohs depending on composition.

Identified September 10, 2026More sedimentary →

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Physical properties

Formation & geological history

Could form as iron-rich weathering residue (laterite/limonite) or as a fragment of sandstone altered and stained by iron oxides; age and formation environment cannot be established visually.

Uses & applications

Usually little commercial value; comparable material may be used as aggregate, pigment source, or geological teaching specimens. This small fragment has negligible jewelry value.

Geological facts

The dark-brown coloration is commonly produced by hematite or goethite coatings. The image does not support a confident mineral-specific identification.

Field identification & locations

Test with a steel nail, streak it on unglazed porcelain, and inspect with a loupe; a red-brown streak suggests hematite, while yellow-brown streak and earthy softness suggest limonite/goethite. Common in soils, weathered outcrops, and sedimentary terrains worldwide.