mineral
Galena (lead ore)
Galena, PbS (lead sulfide)
AI-generated identification · may be incorrectMetallic lead-gray color and luster; commonly forms cubic crystals, though this specimen appears irregular and fractured. Mohs hardness 2.5; perfect cubic cleavage and exceptionally high specific gravity (~7.4–7.6).
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Physical properties
Metallic lead-gray color and luster; commonly forms cubic crystals, though this specimen appears irregular and fractured. Mohs hardness 2.5; perfect cubic cleavage and exceptionally high specific gravity (~7.4–7.6).
Formation & geological history
Forms in hydrothermal veins and replacement deposits, often with sphalerite, calcite, or quartz. Such deposits formed at many geological ages as mineral-rich fluids cooled in fractures and cavities.
Uses & applications
Historically the principal ore of lead, used in batteries, radiation shielding, and alloys; attractive crystalline pieces are collected, but it is not typically used as a gemstone.
Geological facts
Galena is unusually dense and can contain silver; avoid grinding or handling it carelessly because lead-bearing dust is toxic.
Field identification & locations
Check for its heft, metallic gray surface, and blocky cubic cleavage; common worldwide, including the U.S. Midwest, Missouri, and the U.K. This image is consistent with galena, though a photo alone cannot confirm it.
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