sedimentary

Weathered iron-rich rock, likely hematite-bearing sandstone or ironstone

Hematite/goethite-bearing ferruginous sandstone or ironstone; exact identification requires testing

AI-generated identification · may be incorrect

Rust-red to dark gray, earthy to submetallic luster, granular texture, and irregular fracture; likely hardness about 5–6, with hematite streak red-brown and goethite yellow-brown. No clear crystal faces or cleavage are visible.

Identified August 15, 2026More sedimentary →

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At a glance

Common name: Weathered iron-rich rock, likely hematite-bearing sandstone or ironstone
Scientific name: Hematite/goethite-bearing ferruginous sandstone or ironstone; exact identification requires testing
Category: sedimentary
Identified: August 15, 2026
Method: Standard

AI Estimated Value

Typically $1–$10 for a common hand specimen; $10–$50 if unusually attractive, dense, or locality-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 when iron oxides cemented or replaced sand-rich sediment, followed by weathering and oxidation near the surface. Such ironstone deposits range from ancient Precambrian formations to much younger weathering crusts.

Uses & applications

Used locally as iron ore, pigment, aggregate, and a collector specimen; this small piece has little commercial value unless assays show unusually high iron content.

Geological facts

The dark gray areas may represent denser hematite or magnetite, while orange-brown surfaces are likely goethite, limonite, or weathered iron minerals.

Field identification & locations

Common in iron-rich soils, banded iron formations, stream gravels, and weathered outcrops worldwide. Check for a red-brown streak on unglazed porcelain, moderate heft, and attraction to a magnet; a strong magnetic response would suggest magnetite. Identification is uncertain from appearance alone.