mineral
Magnetite (lodestone), possibly meteoritic iron
Magnetite, Fe₃O₄; exact identification is uncertain from the image alone
AI-generated identification · may be incorrectBlack 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;…
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Physical properties
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; a metal file, nickel-rich composition, and unusually high density could indicate meteoritic iron.
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.
