mineral

Galena

Galena (lead sulfide, PbS)

AI-generated identification · may be incorrect

Typically lead-gray to silver-gray with a bright metallic luster, cubic crystal structure, and excellent cubic cleavage; Mohs hardness 2.5–2.75 and specific gravity about 7.4–7.6. The specimen appears massive/granular and may show weathered surfaces, so identification from the image is provisional.

Identified August 11, 2026More mineral →

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Physical properties

Formation & geological history

Forms mainly in hydrothermal veins and replacement deposits, commonly with sphalerite, pyrite, calcite, and quartz. It is generally associated with diverse Phanerozoic ore systems rather than one specific age.

Uses & applications

The principal ore of lead and an important historical source of silver; specimens are collected for their metallic appearance and cubic cleavage. Lead-bearing material is not suitable for casual handling, ingestion, or use in jewelry.

Geological facts

A fresh surface produces a dark gray streak, and its unusually high density is a strong diagnostic feature. Galena commonly tarnishes to dull gray or develops white, yellow, or brown oxidation products.

Field identification & locations

Common localities include Missouri and Illinois, USA; Peru; Mexico; Australia; and the United Kingdom. Confirm with density, metallic gray streak, cubic cleavage, and ideally chemical or instrumental testing; avoid dust and wash hands after handling.