mineral

Silver-gray metallic ore, possibly galena-bearing rock

Likely galena (PbS) in a host rock, but identification is uncertain from the photograph

AI-generated identification · may be incorrect

Coarse, irregular gray fragment with metallic to submetallic luster and lighter sparkling surfaces; galena has Mohs hardness 2.5–3, cubic cleavage, and very high specific gravity (~7.5). The specimen appears mixed with a pale gray host mineral rather than a clean crystal.

Identified August 15, 2026More mineral →

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Physical properties

Formation & geological history

Galena forms in hydrothermal sulfide veins and replacement deposits, commonly with quartz, calcite, sphalerite, and pyrite; deposits range from Precambrian to Cenozoic. Age cannot be determined visually.

Uses & applications

Lead ore historically used for batteries, radiation shielding, ammunition, and alloys; attractive cubic crystals are collected, but lead-bearing specimens require careful handling.

Geological facts

Galena’s diagnostic traits are exceptional heft, dark gray streak, metallic luster, and cubic cleavage. Do not grind, lick, or handle it around children or food because lead-bearing dust is toxic.

Field identification & locations

Test cautiously by comparing weight, streak on unglazed ceramic, and cleavage; avoid destructive testing without safety controls. Common sources include Missouri, Idaho, Colorado, Peru, Mexico, Australia, and the United Kingdom.