mineral
Galena
Galena (lead sulfide, PbS)
AI-generated identification · may be incorrectTypically lead-gray with metallic luster and cubic crystals; Mohs hardness 2.5–2.75, perfect cubic cleavage, and very high specific gravity (~7.4–7.6). The pictured specimen’s blocky, stepped faces are consistent with galena, though an image alone cannot confirm it.
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Physical properties
Typically lead-gray with metallic luster and cubic crystals; Mohs hardness 2.5–2.75, perfect cubic cleavage, and very high specific gravity (~7.4–7.6). The pictured specimen’s blocky, stepped faces are consistent with galena, though an image alone cannot confirm it.
Formation & geological history
Forms in hydrothermal veins and sedimentary-hosted ore deposits, often with sphalerite, calcite, or quartz; deposits range from ancient to geologically recent.
Uses & applications
Historically the principal ore of lead, used in batteries, shielding, and alloys; attractive crystal specimens are collected. Avoid handling dust and wash hands, as lead is toxic.
Geological facts
Galena’s cubic cleavage is a key diagnostic feature, and some crystals contain enough silver to be an important silver ore.
Field identification & locations
Check for unusually heavy weight, metallic gray color, and cleavage into right-angled cubic fragments; common worldwide, including major deposits in the United States, Australia, and Europe.
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