mineral

Galena-bearing sulfide specimen

Galena (PbS), possibly with sphalerite and iron sulfides

AI-generated identification · may be incorrect

Dark lead-gray, metallic luster, irregular massive texture with locally bright reflective surfaces; galena hardness 2.5–2.75, cubic cleavage, and very high specific gravity (~7.5). Exact identification is limited by the image and may require streak, density, or testing.

Identified August 26, 2026More mineral →

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Physical properties

Formation & geological history

Forms in hydrothermal veins and carbonate-replacement deposits, commonly with sphalerite, pyrite, and quartz; specimens range from Paleozoic to younger geological ages.

Uses & applications

Collected as an ore mineral and occasionally displayed; galena is the principal lead ore, while associated sphalerite may provide zinc. Not suitable for casual handling or jewelry because lead-bearing dust is toxic.

Geological facts

Its diagnostic cubic cleavage and unusually heavy feel distinguish it from most dark rocks; freshly broken galena is bright silver-gray but tarnishes.

Field identification & locations

Common in lead-zinc districts such as Missouri and Illinois, the Rocky Mountains, Mexico, Peru, Australia, and Europe. Look for a metallic gray streak, cubic cleavage, and high density; avoid inhaling dust or licking the specimen.