sedimentary

Likely weathered iron-rich sandstone or laterite

Ferruginous sandstone; predominantly quartz (SiO₂) cemented or stained by iron oxides such as hematite (Fe₂O₃) and goethite (FeO(OH))

AI-generated identification · may be incorrect

Small, irregular reddish-brown fragment with a dull to slightly granular luster and apparent sandy texture; quartz hardness is about Mohs 7, while the iron-rich matrix is softer. Exact mineralogy, cleavage, and specific gravity require testing; it appears opaque and non-crystalline at hand scale.

Identified August 30, 2026More sedimentary →

Explore Likely weathered iron-rich sandstone or laterite in the encyclopedia →

Identify your own rocks.

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

App Store Google Play

At a glance

Common name: Likely weathered iron-rich sandstone or laterite
Scientific name: Ferruginous sandstone; predominantly quartz (SiO₂) cemented or stained by iron oxides such as hematite (Fe₂O₃) and goethite (FeO(OH))
Category: sedimentary
Identified: August 30, 2026
Method: Standard

AI Estimated Value

Typically under $1 as an unremarkable fragment; approximately $2-$10 only if part of a labeled, unusual, or locality-specific specimen.

Not an official valuation

AI estimate for general interest only — not an appraisal. Actual value depends on condition, provenance, and market demand. Verify with a professional before buying, selling, or insuring.

This identification was generated by AI and may contain errors. Verify important details before relying on them — and never use an AI result to judge whether a specimen is safe to handle. Read the full disclaimer

Physical properties

Formation & geological history

Likely formed from sand deposited and lithified, then colored or cemented by oxidized iron during weathering; comparable ferruginous rocks range from ancient sedimentary formations to modern lateritic soil profiles.

Uses & applications

Usually used as ordinary building or aggregate stone when present in quantity; this small fragment has negligible commercial or jewelry value.

Geological facts

The red-brown color reflects oxidized iron rather than copper or precious metal. A streak test, hardness test, and dilute hydrochloric-acid test can help distinguish it from carbonate rocks.

Field identification & locations

Look for visible sand grains, rusty red coloration, earthy fracture, and no obvious glassy or metallic luster; common in arid, tropical, and strongly weathered terrains worldwide. A magnet test may show weak attraction if magnetite is present.