mineral

Likely galena-bearing rock fragment

Galena (PbS), possibly in a quartz- or carbonate-rich matrix

AI-generated identification · may be incorrect

Small, gray, metallic-looking fragment with irregular fracture; galena has Mohs hardness 2.5, cubic crystals and perfect cubic cleavage, and specific gravity about 7.4–7.6. The image alone cannot confirm its composition; this piece does not show unmistakable cubic cleavage.

Identified October 10, 2026More mineral →

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Physical properties

Formation & geological history

Galena forms in hydrothermal veins and sedimentary replacement deposits, often with sphalerite, quartz, or calcite; such deposits range widely in geological age.

Uses & applications

Galena is the chief ore of lead, used in lead production and historically in crystal radio detectors; attractive specimens are collected, but lead-bearing material is not suitable for jewelry or handling by children.

Geological facts

Galena is exceptionally dense for its size and commonly breaks into shiny cubic fragments.

Field identification & locations

Check for unusually high heft and right-angle cleavage, but confirm with mineral testing or analysis; similar gray fragments can be other minerals or metal. Common in lead-zinc mining districts worldwide; wash hands after handling and avoid creating dust.