mineral
Galena
Lead sulfide (PbS)
AI-generated identification · may be incorrectMohs hardness of 2.5, metallic silver-gray color, bright metallic luster, cubic crystal system with perfect cubic cleavage, and a very high specific gravity around 7.4-7.6.
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Physical properties
Mohs hardness of 2.5, metallic silver-gray color, bright metallic luster, cubic crystal system with perfect cubic cleavage, and a very high specific gravity around 7.4-7.6.
Formation & geological history
Forms in hydrothermal veins, sedimentary replacement deposits, and contact metamorphic environments associated with limestone.
Uses & applications
Primarily mined as the world's main ore of lead and a significant source of silver.
Geological facts
Galena was historically used by ancient Egyptians as kohl eyeliner and played a crucial role in early crystal radio receivers as a point-contact diode.
Field identification & locations
Easily identified by its exceptionally heavy weight for its size, bright metallic luster, and distinct cubic cleavage fragments.
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