mineral
Galena with Quartz
Lead sulfide (PbS) associated with Silicon dioxide (SiO2)
AI-generated identification · may be incorrectGalena has a Mohs hardness of 2.5, metallic silver-gray color, bright metallic luster, cubic crystal system, and perfect cubic cleavage with high specific gravity (7.4-7.6). Quartz has a hardness of 7 and vitreous luster.
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Physical properties
Galena has a Mohs hardness of 2.5, metallic silver-gray color, bright metallic luster, cubic crystal system, and perfect cubic cleavage with high specific gravity (7.4-7.6). Quartz has a hardness of 7 and vitreous luster.
Formation & geological history
Forms in hydrothermal veins, low- to high-temperature ore deposits, and sedimentary replacement formations.
Uses & applications
Primary ore of lead, historically used in ceramics, radiation shielding, and early radio crystal detectors.
Geological facts
Galena is famously known for its dense weight and distinct cubic cleavage, often breaking into miniature cubes when struck.
Field identification & locations
Easily identified by its extreme density, metallic gray luster, and dark gray streak. Commonly found globally alongside sphalerite, pyrite, and quartz.
