mineral

Likely galena-bearing ore

Galena (lead sulfide, PbS), possibly mixed with sulfide minerals

AI-generated identification · may be incorrect

Metallic gray to bluish-gray, coarse and irregular, with apparent reflective cleavage surfaces; galena has Mohs hardness 2.5–2.75, cubic crystals/cleavage, and very high specific gravity (~7.5). The photograph is insufficient to confirm composition or distinguish it from other metallic sulfide ore.

Identified August 9, 2026More mineral →

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Physical properties

Formation & geological history

Forms in hydrothermal veins and replacement deposits, commonly with sphalerite, chalcopyrite, pyrite, and quartz. Deposits range from Precambrian to younger Phanerozoic ages.

Uses & applications

Galena is the principal ore of lead and historically an important source of silver; specimens are collected for their metallic luster and cubic cleavage. Do not grind, heat, or handle extensively because lead-bearing dust is toxic.

Geological facts

Fresh galena typically shows bright silver-gray metallic faces and sharply cubic cleavage, unlike most iron-rich rocks. A streak test, density comparison, and professional chemical/XRF analysis are useful for confirmation.

Field identification & locations

Common localities include Missouri and Idaho (USA), Mexico, Peru, Australia, and Europe. If the specimen is unusually light or lacks cubic cleavage, it may instead be another sulfide or metallic-looking metamorphic rock.