mineral

Likely galena (lead sulfide)

Galena, PbS

AI-generated identification · may be incorrect

The specimen is gray and metallic-looking, consistent with galena, though the photo alone cannot confirm identity. Galena has Mohs hardness 2.5, a cubic crystal structure, perfect cubic cleavage, and high specific gravity (~7.4–7.6).

Identified October 6, 2026More mineral →

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Physical properties

Formation & geological history

Galena forms in hydrothermal veins and sedimentary-hosted replacement deposits, often alongside sphalerite, calcite, or quartz. Such deposits formed at many geological ages as mineral-rich fluids cooled or reacted with surrounding rocks.

Uses & applications

Historically the principal ore of lead; lead is used in batteries, radiation shielding, and alloys. Attractive crystals are also collected, but lead-bearing specimens should be handled carefully and kept away from children.

Geological facts

Galena’s unusually high density and tendency to cleave into cubic fragments are useful diagnostic clues. It commonly occurs with silver-bearing minerals, making some galena ores economically valuable for silver as well.

Field identification & locations

Check heft and cleavage, and avoid scratching or testing it in ways that create dust; identification from this image is uncertain. Important deposits occur worldwide, including the United States, Australia, China, and Peru.