mineral

Galena-bearing ore (tentative)

Galena, lead sulfide (PbS), possibly mixed with quartz or sulfide minerals

AI-generated identification · may be incorrect

Gray to silver-gray, metallic luster, granular and irregular in the image; galena has Mohs hardness 2.5–2.75, cubic crystals and perfect cubic cleavage, with very high specific gravity (~7.5).

Identified September 3, 2026More mineral →

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Physical properties

Gray to silver-gray, metallic luster, granular and irregular in the image; galena has Mohs hardness 2.5–2.75, cubic crystals and perfect cubic cleavage, with very high specific gravity (~7.5).

Formation & geological history

Forms mainly in hydrothermal veins and replacement deposits, commonly with sphalerite, pyrite, and quartz. Deposits range from Precambrian to modern geological ages.

Uses & applications

Historically the principal ore of lead and an important source of silver; specimens are collected, but lead-bearing material should not be handled extensively or used near food.

Geological facts

Galena is unusually dense for its size and commonly breaks into shiny cubic fragments. The image alone cannot confirm composition; similar dark metallic sulfide ores are possible.

Field identification & locations

Look for exceptional heft, metallic gray color, and cubic cleavage; a streak test may produce a dark gray streak, but avoid dust and wash hands because lead is toxic. Common localities include Missouri, Idaho, Australia, Peru, and Mexico.