sedimentary

Likely weathered iron-rich pebble (brown sandstone or ironstone)

Indeterminate ferruginous sandstone/ironstone; commonly quartz (SiO₂) with iron oxides such as goethite and hematite

AI-generated identification · may be incorrect

Brown, rounded, dull to earthy luster with granular texture and yellow-brown iron-stained patches. Likely hardness about 5–7 Mohs, no obvious cleavage, and moderate-to-high density; the image is insufficient for precise identification.

Identified August 24, 2026More sedimentary →

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At a glance

Common name: Likely weathered iron-rich pebble (brown sandstone or ironstone)
Scientific name: Indeterminate ferruginous sandstone/ironstone; commonly quartz (SiO₂) with iron oxides such as goethite and hematite
Category: sedimentary
Identified: August 24, 2026
Method: Standard

AI Estimated Value

Typically $0–$5 as a common pebble; potentially higher only if testing reveals a rare mineral, fossil, or meteorite.

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 a naturally weathered and water-rounded sedimentary pebble, with iron minerals cementing or staining quartz-rich sediment. Its geological age and locality cannot be determined visually.

Uses & applications

Usually used as a common landscape or teaching specimen rather than for jewelry or construction; collector value is generally minimal unless it proves to be an unusual fossil, meteorite, or mineral specimen.

Geological facts

Iron oxides produce the characteristic rusty brown, ochre, and yellow coloration. A magnet test may show weak attraction if magnetite is present, but iron staining alone is usually nonmagnetic.

Field identification & locations

Common in stream gravels, soils, and weathered outcrops worldwide. Inspect fresh surfaces, test streak (likely pale brown to yellow), hardness against glass, density, and magnetism; definitive identification requires locality and testing.