mineral
Galena (lead sulfide)
Galena, PbS
AI-generated identification · may be incorrectMetallic lead-gray color with bright silver-gray faces and cubic cleavage; Mohs hardness 2.5, cubic crystal structure, and very high specific gravity (~7.4–7.6). The blocky shape and lustrous surfaces are characteristic, though the image alone cannot confirm identity.
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Physical properties
Metallic lead-gray color with bright silver-gray faces and cubic cleavage; Mohs hardness 2.5, cubic crystal structure, and very high specific gravity (~7.4–7.6). The blocky shape and lustrous surfaces are characteristic, though the image alone cannot confirm identity.
Formation & geological history
Forms in hydrothermal veins and replacement deposits, often with sphalerite, calcite, or quartz; deposits range widely in geological age.
Uses & applications
Historically the principal ore of lead, used in batteries, shielding, and alloys; attractive crystals are collected, but lead-bearing material should not be handled or made into jewelry.
Geological facts
Galena commonly breaks into cubes because of its perfect cubic cleavage and is exceptionally heavy for its size.
Field identification & locations
Look for a heavy, metallic-gray specimen with cubic faces or right-angle cleavage, commonly in lead-zinc ore districts. Common sources include the United States, Australia, and parts of Europe; use gloves and wash hands after handling.
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