mineral

Galena (probable)

Galena, lead sulfide (PbS)

AI-generated identification · may be incorrect

A small metallic gray, possibly tarnished specimen with a rounded or weathered surface; galena has Mohs hardness 2.5–2.75, very high specific gravity (~7.5), metallic luster, and cubic cleavage/crystals. The photograph is insufficient to confirm cleavage or composition.

Identified August 21, 2026More mineral →

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Physical properties

Formation & geological history

Galena forms mainly in hydrothermal veins and replacement deposits, commonly with sphalerite, pyrite, and quartz; deposits range from Precambrian to Cenozoic in age. It is commonly found in the United States, Mexico, Peru, Australia, and Europe.

Uses & applications

The principal ore of lead and an important historical source of silver; attractive cubic crystals are collected, but it is unsuitable for jewelry because it is soft and contains toxic lead.

Geological facts

Its unusually heavy feel is a key clue. Fresh galena is bright silver-gray but commonly develops a dull lead-gray tarnish; avoid generating dust and wash hands after handling.

Field identification & locations

Test cautiously for exceptional heft, metallic gray color, and cubic cleavage; a streak test is lead-gray, but chemical or X-ray analysis is needed for certainty. Common specimens sell for about $5–$30, while large, sharp crystal clusters may reach $100–$500+.