sedimentary

Likely weathered sandstone or iron-stained limestone fragment

Indeterminate clastic carbonate/siliciclastic rock; likely quartz-rich sandstone or porous limestone with iron-oxide staining

AI-generated identification · may be incorrect

Hardness likely Mohs 3–7 depending on composition; ochre-yellow to brown, dull to earthy luster, irregular granular texture, and no visible crystal faces or cleavage. The porous, weathered surface and orange coloration suggest limonite/goethite coating or cement.

Identified August 13, 2026More sedimentary →

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At a glance

Common name: Likely weathered sandstone or iron-stained limestone fragment
Scientific name: Indeterminate clastic carbonate/siliciclastic rock; likely quartz-rich sandstone or porous limestone with iron-oxide staining
Category: sedimentary
Identified: August 13, 2026
Method: Standard

AI Estimated Value

$0-$5 for an ordinary fragment; under $20 if unusually attractive or locally significant

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 as sedimentary rock through deposition, compaction, and cementation, then chemically weathered and eroded into this fragment. Exact geological age and formation environment cannot be determined from the image alone.

Uses & applications

Unlikely to have commercial value in this form; comparable material may be used as building stone, aggregate, or decorative landscaping rock. It is not visibly suitable for jewelry.

Geological facts

Iron oxides commonly produce yellow, orange, and reddish coloration in weathered rocks. A vinegar test can distinguish carbonate-rich limestone, which may fizz, from sandstone, which generally will not.

Field identification & locations

Commonly encountered in weathered outcrops, soil, construction fill, and streambeds; identification requires a fresh surface, acid reaction, grain inspection, and hardness testing. Estimated value: typically $0–$5 as an ordinary fragment, or under $20 if unusually attractive or locally significant.