
mineral
Likely galena (lead ore)
Galena, PbS
AI-generated identification · may be incorrectThe specimen appears to be a small, dull silver-gray metallic fragment, but its appearance is insufficient for confident identification. Galena has Mohs hardness 2.5, cubic crystals and perfect cubic cleavage; specific gravity is about 7.4–7.6.
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Physical properties
The specimen appears to be a small, dull silver-gray metallic fragment, but its appearance is insufficient for confident identification. Galena has Mohs hardness 2.5, cubic crystals and perfect cubic cleavage; specific gravity is about 7.4–7.6.
Formation & geological history
Galena forms in hydrothermal veins and sedimentary replacement deposits, commonly with sphalerite, calcite, or quartz. Such deposits formed at many geological ages.
Uses & applications
Galena is the principal lead ore, historically used in lead production; attractive crystalline pieces are collected, though this fragment shows little display quality.
Geological facts
Fresh galena is bright metallic gray and unusually heavy; weathering can dull its surface. Lead-bearing specimens should be handled sparingly, with hands washed afterward.
Field identification & locations
Check for exceptional heft and cubic cleavage, but confirm with reliable testing because the photo alone cannot establish the material. Galena occurs worldwide, including major deposits in the United States, Australia, and Europe.
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