mineral

Metallic sulfide mineral fragment, likely galena

Galena (lead sulfide, PbS), tentative identification

AI-generated identification · may be incorrect

Small irregular silvery-gray fragment with bright metallic luster and blocky surfaces; galena has Mohs hardness 2.5–2.75, cubic crystal structure, perfect cubic cleavage, and very high specific gravity (~7.5). The image alone cannot exclude a metallic ore fragment or man-made metal.

Identified August 13, 2026More mineral →

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Physical properties

Formation & geological history

Galena forms in hydrothermal ore veins and carbonate-hosted lead-zinc deposits, commonly with sphalerite, pyrite, and calcite; deposits range from Precambrian to Cenozoic. It is not classifiable as igneous, sedimentary, or metamorphic because it is a mineral.

Uses & applications

Historically the primary lead ore, used in batteries, radiation shielding, ammunition, and lead production; attractive crystals are collected, but it is unsuitable for jewelry because lead sulfide is toxic and fragile.

Geological facts

Its dense, silver-gray appearance and tendency to break into cubic fragments are diagnostic. Avoid handling dust, washing it with bare hands, or placing it near food; wash hands after contact.

Field identification & locations

Common localities include Missouri, Illinois, Idaho, Colorado, Peru, Australia, and Mexico. Confirm with density, cubic cleavage, and a streak test (gray-black), preferably using gloves; do not scratch or grind it indoors.