mineral

Magnetite (lodestone), possibly meteoritic iron

Magnetite, Fe₃O₄; exact identification is uncertain from the image alone

AI-generated identification · may be incorrect

Black to dark gray, metallic/submetallic luster, opaque, Mohs hardness 5.5–6.5, commonly massive rather than visibly crystalline, with uneven fracture and relatively high density (about 5.2 g/cm³). Strong attraction to a magnet would support magnetite;…

Identified September 8, 2026More mineral →

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At a glance

Common name: Magnetite (lodestone), possibly meteoritic iron
Scientific name: Magnetite, Fe₃O₄; exact identification is uncertain from the image alone
Category: mineral
Identified: September 8, 2026
Method: Standard

AI Estimated Value

Common magnetite: $5–$30; attractive lodestone: $20–$150; authenticated meteorite or unusual slag: highly variable, roughly $1–$10+ per gram.

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

Magnetite forms in igneous, metamorphic, and hydrothermal environments, while lodestone is naturally magnetized magnetite. The irregular, apparently melted or worked surface could also represent industrial slag or a processed specimen; geological age and origin cannot be established visually.

Uses & applications

Magnetite is an important iron ore, pigment, and dense aggregate; lodestones are collected for their magnetism. Meteorites have scientific and collector value.

Geological facts

The specimen appears black, heavy, and locally glossy, but the apparent cavity and smooth surfaces are not diagnostic and may reflect melting, cutting, or weathering.

Field identification & locations

Test magnetism, streak (magnetite gives a black streak), density, and nickel with professional analysis; avoid assuming meteorite status from appearance alone. Common sources include iron-ore deposits, beach placers, and volcanic terrains.