mineral

Likely galena-bearing ore specimen

Galena (PbS), possibly with quartz or calcite gangue

AI-generated identification · may be incorrect

Metallic lead-gray luster, irregular massive texture, and apparent bright reflective cleavage surfaces; galena has cubic cleavage, Mohs hardness 2.5–2.75, and specific gravity about 7.5. The image is insufficient to confirm composition, and the pale material may be quartz, calcite, or weathered sulfide.

Identified August 9, 2026More mineral →

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Physical properties

Formation & geological history

Galena forms in hydrothermal veins and replacement deposits, commonly with sphalerite, pyrite, quartz, and calcite; deposits range from Precambrian to Cenozoic ages. Common localities include Missouri, Idaho, Colorado, Peru, Mexico, Australia, and the UK.

Uses & applications

Historically the principal ore of lead, used in batteries, radiation shielding, solder, and alloys; attractive crystals are collected. Avoid handling dust or ingesting residue because lead compounds are toxic.

Geological facts

True galena commonly breaks into shiny right-angled fragments and feels unusually heavy for its size. A streak test is lead-gray, but testing should be done cautiously and never on household surfaces.

Field identification & locations

Check heft, cubic cleavage, metallic luster, and streak; confirm with hardness, specific gravity, or laboratory XRF. Estimated value: $5–$30 for a common rough specimen, $50–$300+ for large, well-crystallized examples.