igneous
Possible basaltic volcanic rock or iron-rich meteorite
Likely basalt (plagioclase–pyroxene rock); meteorite status cannot be confirmed visually
AI-generated identification · may be incorrectDark gray-black, fine-grained, dull to weakly submetallic surface with irregular weathering and a possible pale mineral vein. Basalt typically has Mohs hardness 6, no cleavage, and specific gravity about 2.8–3.1; metallic meteorites are much denser and magnetic.
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Physical properties
Dark gray-black, fine-grained, dull to weakly submetallic surface with irregular weathering and a possible pale mineral vein. Basalt typically has Mohs hardness 6, no cleavage, and specific gravity about 2.8–3.1; metallic meteorites are much denser and magnetic.
Formation & geological history
Basalt forms when mafic lava cools rapidly at or near Earth’s surface, commonly in volcanic fields and oceanic crust. The rounded, weathered shape may also be anthropogenic or glacial; no geological age can be assigned from the image.
Uses & applications
Basalt is used as aggregate, roadstone, dimension stone, and occasionally in carvings. If meteoritic, value depends on verified extraterrestrial origin and classification.
Geological facts
The specimen’s shape and texture are not diagnostic of a meteorite; many terrestrial basalt fragments look similar. A magnet test, streak test, fresh cut surface, and laboratory elemental/isotopic analysis are needed for confirmation.
Field identification & locations
Check for vesicles, a gray-white streak, and abundant tiny crystals—features favoring basalt; a strong magnetic response, fusion crust, and nickel-iron metal favor meteorite. Common basalt sources include volcanic regions worldwide; submit suspected meteorites to a recognized laboratory.
