sedimentary

Weathered ironstone pebble

Iron-oxide-cemented sediment, likely limonite/goethite-rich; exact identification cannot be confirmed from the image alone

AI-generated identification · may be incorrect

Rounded, ochre-brown pebble with a dull to earthy surface and a rough, possibly vuggy patch. Ironstone hardness varies (roughly 4–6.5 Mohs); crystal structure and specific gravity cannot be determined visually.

Identified October 10, 2026More sedimentary →

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At a glance

Common name: Weathered ironstone pebble
Scientific name: Iron-oxide-cemented sediment, likely limonite/goethite-rich; exact identification cannot be confirmed from the image alone
Category: sedimentary
Identified: October 10, 2026
Method: Standard

AI Estimated Value

About $1–$5 as an ordinary pebble; little collector value without a distinctive feature or confirmed identification.

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

Likely formed when iron oxides cemented sediment or replaced rock, then was weathered and rounded by transport. Ironstone forms in many geological periods and environments.

Uses & applications

Commonly collected as a curiosity; iron-rich material may be used as low-grade ore or pigment, but this small specimen has no apparent commercial use.

Geological facts

Limonite is a mixture of hydrated iron oxides rather than a single mineral; goethite is one of its principal components.

Field identification & locations

Brown coloration and an earthy, dense appearance suggest iron-rich material, but a streak test and hardness test would help distinguish it from other rocks. Ironstone pebbles occur in many sedimentary regions.