mineral

Galena-bearing ore

Galena (lead sulfide, PbS), likely with quartz/carbonate gangue and weathered sulfides

AI-generated identification · may be incorrect

Metallic gray to silver, locally tarnished brown/iridescent; galena has cubic crystals, perfect cubic cleavage, Mohs hardness 2.5–2.75, and very high specific gravity (~7.5). The specimen appears massive and partly oxidized, so crystal form is not clearly visible.

Identified September 16, 2026More mineral →

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Physical properties

Formation & geological history

Forms mainly in hydrothermal vein and replacement deposits, commonly with sphalerite, pyrite, quartz, and calcite. Deposits range from Precambrian to Cenozoic, depending on locality.

Uses & applications

Important historical source of lead and silver; attractive fresh cubic crystals are collected, but galena is generally unsuitable for jewelry because it is soft, brittle, and toxic.

Geological facts

Its unusually high density is a strong diagnostic clue. Weathering can produce cerussite, anglesite, and brown iron-oxide coatings; avoid generating dust or handling before eating.

Field identification & locations

Test cautiously for exceptional heft, metallic luster, gray-black streak, and cubic cleavage; a streak test and specific-gravity comparison help confirm it. Common worldwide in Mississippi Valley-type and polymetallic hydrothermal districts.