mineral

Rounded metallic-looking pebble, likely iron-rich rock or slag

Uncertain; possible limonite/goethite-rich ironstone, hematite-bearing material, or industrial slag

AI-generated identification · may be incorrect

Brown-gold and dark gray, dull to slightly metallic luster, irregularly rounded surface, and apparently opaque. Hardness is uncertain (likely about 4–6 Mohs); no reliable crystal structure or cleavage is visible, and density/magnetism would be diagnostic.

Identified August 17, 2026More mineral →

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At a glance

Common name: Rounded metallic-looking pebble, likely iron-rich rock or slag
Scientific name: Uncertain; possible limonite/goethite-rich ironstone, hematite-bearing material, or industrial slag
Category: mineral
Identified: August 17, 2026
Method: Standard

AI Estimated Value

Approximately $0–$10 as an unidentified common specimen; attractive or demonstrably natural iron minerals may sell for $10–$50.

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

If natural, it may be weathered ironstone formed by oxidation and concentration of iron minerals in soil or sediment; if slag, it is a human-processed smelting byproduct. Age cannot be determined from the photograph.

Uses & applications

Ironstone has limited ornamental or educational use; slag may be collected as an industrial artifact but has little commercial value. It is not identifiable as a gemstone from appearance alone.

Geological facts

A strong magnet, streak test, and specific-gravity measurement can distinguish common possibilities: hematite gives a red-brown streak, magnetite a black streak and strong magnetism, while slag may show glassy texture, bubbles, or flow patterns.

Field identification & locations

Common natural analogues occur in iron-rich soils and sedimentary deposits worldwide; slag is common near historic furnaces, mines, and foundries. Test discreetly for magnetism and streak, and inspect for vesicles or glassy patches.