mineral

Galena

Galena (lead sulfide, PbS)

AI-generated identification · may be incorrect

Typically metallic lead-gray with bright luster, cubic crystal structure and perfect cubic cleavage; Mohs hardness 2.5–2.75, specific gravity about 7.4–7.6. The specimen’s dark, reflective, massive appearance is consistent with galena, though image-only identification is tentative.

Identified September 6, 2026More mineral →

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Physical properties

Formation & geological history

Forms mainly in hydrothermal sulfide veins and replacement deposits, commonly with sphalerite, chalcopyrite, pyrite, and calcite. Deposits range from Precambrian to Cenozoic in age.

Uses & applications

The principal historical ore of lead and an important source of silver; valued by mineral collectors. It is not suitable for jewelry handling or casual use because lead-bearing dust and residues are toxic.

Geological facts

Galena often breaks along right-angled cubic surfaces and may leave a dark gray streak. Silver-rich galena is called argentiferous galena.

Field identification & locations

Commonly found in Missouri, Illinois, Wisconsin, Colorado, Peru, Bolivia, Australia, and the United Kingdom. Confirm with a streak test, unusually high density, cubic cleavage, and professional testing; avoid grinding or inhaling dust.