sedimentary

Rounded iron-rich stone or concretion

Indeterminate; possibly hematite-/goethite-bearing sandstone or an ironstone concretion

AI-generated identification · may be incorrect

Hardness likely 5–6.5 Mohs; rounded, pinkish-brown to gray surface with dull earthy luster, fine-grained texture, and small pits. No visible crystals or cleavage; apparent size is about 3–4 cm.

Identified September 16, 2026More sedimentary →

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At a glance

Common name: Rounded iron-rich stone or concretion
Scientific name: Indeterminate; possibly hematite-/goethite-bearing sandstone or an ironstone concretion
Category: sedimentary
Identified: September 16, 2026
Method: Standard

AI Estimated Value

Usually under $1–$10 as an unverified common stone; more if testing confirms an unusual mineral or meteorite, though this appearance is not diagnostic of a 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

Hardness likely 5–6.5 Mohs; rounded, pinkish-brown to gray surface with dull earthy luster, fine-grained texture, and small pits. No visible crystals or cleavage; apparent size is about 3–4 cm.

Formation & geological history

Likely formed by weathering and cementation of iron-bearing sediment, then naturally rounded by transport; exact age and origin cannot be determined from the photograph. It could also be a weathered industrial slag or another non-geological object, requiring testing.

Uses & applications

Common specimens have little commercial use or value; ironstone is used as iron ore where sufficiently rich, while attractive rounded pieces may be collected as curiosities.

Geological facts

Iron oxides commonly produce red, brown, yellow, or purplish colors. A streak test, magnet test, density measurement, and fresh-surface inspection would greatly improve identification.

Field identification & locations

Check whether it leaves a red-brown streak, attracts a magnet, and has a metallic interior when chipped—features supporting iron minerals. Common analogues occur in weathered soils, stream gravels, and ironstone deposits worldwide.