mineral
Galena (likely)
Galena, lead sulfide (PbS)
AI-generated identification · may be incorrectMetallic lead-gray color and bright luster; galena is cubic, Mohs hardness 2.5, and has perfect cubic cleavage. The photo’s silvery, irregular fragment is consistent with galena, though identification from an image alone is uncertain.
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Physical properties
Metallic lead-gray color and bright luster; galena is cubic, Mohs hardness 2.5, and has perfect cubic cleavage. The photo’s silvery, irregular fragment is consistent with galena, though identification from an image alone is uncertain.
Formation & geological history
Forms in hydrothermal veins and sedimentary-hosted ore deposits as sulfide minerals precipitate from mineral-rich fluids; deposits range from Precambrian to recent geological ages.
Uses & applications
Historically the chief ore of lead, used in batteries, radiation shielding, and alloys; attractive cleavage pieces are collected, but lead-bearing specimens should be handled carefully.
Geological facts
Galena is exceptionally dense (specific gravity about 7.4–7.6); fresh broken surfaces can show conspicuous stepped cubic cleavage.
Field identification & locations
Common in ore districts worldwide, including the U.S. Midwest, England, Germany, and Australia. Check for high heft and cubic cleavage; avoid scratching or creating dust, and wash hands after handling.
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