mineral

Likely galena

Galena (lead sulfide, PbS)

AI-generated identification · may be incorrect

The specimen appears dark gray, metallic, and reflective, consistent with galena; typical hardness is 2.5–2.75 Mohs, specific gravity 7.4–7.6, cubic crystal structure, and excellent cubic cleavage. The image is not sufficiently detailed for certainty; graphite, hematite, or metallic slag are alternatives.

Identified August 18, 2026More mineral →

Explore Likely galena in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Galena forms mainly in hydrothermal veins and carbonate-hosted ore deposits, commonly with sphalerite, pyrite, and calcite. Deposits range from ancient Precambrian to much younger, depending on locality.

Uses & applications

Historically the principal ore of lead, used in batteries, radiation shielding, alloys, and pigments; attractive crystals are collected. It is not generally used as jewelry because lead-bearing material is toxic.

Geological facts

Its high density is striking for its size, and fresh broken surfaces are bright silver-gray but tarnish quickly. Avoid generating dust, prolonged handling, or contact with food, and wash hands afterward.

Field identification & locations

Check for very high weight, metallic luster, and blocky right-angle cleavage; a streak test is gray-black. Common localities include Missouri, Illinois, Idaho, Peru, Australia, and Mexico.