sedimentary

Weathered iron-rich sandstone or laterite fragment

Iron-oxide–stained quartz-rich clastic rock; likely ferruginous sandstone (diagnosis uncertain from photograph)

AI-generated identification · may be incorrect

Brown-orange, dull to earthy luster, irregular fracture, and visibly granular texture; likely Mohs hardness ~5–7 where quartz-rich, with lower hardness in clay-rich areas. No clear crystals or cleavage are visible; iron oxides cause the coloration.

Identified September 4, 2026More sedimentary →

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At a glance

Common name: Weathered iron-rich sandstone or laterite fragment
Scientific name: Iron-oxide–stained quartz-rich clastic rock; likely ferruginous sandstone (diagnosis uncertain from photograph)
Category: sedimentary
Identified: September 4, 2026
Method: Standard

AI Estimated Value

About $1–$10 for a common hand specimen; higher only if locality, fossil content, or unusual texture is documented.

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

Probably formed from cemented sand or intensely weathered iron-rich soil, with oxidation producing limonite/goethite staining. Exact age and origin cannot be determined from the image.

Uses & applications

Common material has little commercial value as an isolated piece, though sandstone is used for building stone and aggregate; attractive pieces may be collected as geological curiosities.

Geological facts

The orange-brown color commonly reflects hematite, goethite, or limonite coatings between quartz grains. A streak, hardness, and acid test would substantially improve identification.

Field identification & locations

Look for gritty grains, earthy brown-red color, and lack of visible crystalline cleavage; quartz grains should scratch glass, while iron-rich matrix may crumble. Common worldwide, especially in arid and tropical weathering environments.