mineral

Likely raw galena-bearing ore

Galena (PbS), possibly associated with dark sphalerite or matrix minerals

AI-generated identification · may be incorrect

The specimen appears dark gray to black with metallic to submetallic luster and irregular, partly crystalline surfaces. Galena has Mohs hardness 2.5–2.75, perfect cubic cleavage, a lead-gray streak, and very high specific gravity (~7.5); the image is insufficient to confirm cleavage or composition.

Identified August 16, 2026More mineral →

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Physical properties

Formation & geological history

Galena forms chiefly in hydrothermal lead-zinc sulfide veins, replacement deposits, and carbonate-hosted ore bodies, commonly alongside sphalerite, chalcopyrite, and pyrite. Deposits range from ancient Precambrian systems to younger Mesozoic and Cenozoic veins.

Uses & applications

Historically the principal ore of lead, used in batteries, radiation shielding, ammunition, and alloys; attractive crystalline pieces are collected but are not generally used as gemstones.

Geological facts

Its unusually heavy feel is a strong clue, and fresh surfaces may show bright silver-gray metallic reflectivity. Lead sulfide dust and weathering products are toxic, so avoid grinding, licking, or handling without washing afterward.

Field identification & locations

Common localities include the Viburnum Trend (Missouri), Galena, Illinois, Peru, Mexico, Australia, and the United Kingdom. Confirm with density, streak, and cubic cleavage; definitive identification requires testing or analysis.