mineral
Likely galena-bearing rock
Galena (lead sulfide, PbS), in a gangue rock that may include quartz or other sulfides
AI-generated identification · may be incorrectMetallic lead-gray patches with bright reflective cleavage faces; galena is cubic, Mohs 2.5, and has perfect cubic cleavage. The darker, duller host material cannot be identified confidently from the image.
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Physical properties
Metallic lead-gray patches with bright reflective cleavage faces; galena is cubic, Mohs 2.5, and has perfect cubic cleavage. The darker, duller host material cannot be identified confidently from the image.
Formation & geological history
Galena forms in hydrothermal veins and replacement deposits, commonly with quartz, sphalerite, and other sulfides; its age depends on the deposit.
Uses & applications
Galena is the principal ore of lead and historically supplied silver; attractive pieces are collected, but lead-bearing material should not be handled extensively or ground.
Geological facts
Galena is unusually dense (specific gravity about 7.4–7.6) and commonly breaks into cubic fragments.
Field identification & locations
Look for heavy, lead-gray material and shiny cubic cleavage; confirm with a streak and density test, not appearance alone. Found in sulfide ore deposits worldwide.
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