mineral

Small metallic mineral fragment, possibly galena or slag-like sulfide

Tentatively galena (PbS), but identification is uncertain from the image

AI-generated identification · may be incorrect

Gray-green, dull to weakly metallic, irregularly rounded fragment with possible granular/crystalline texture; galena has Mohs hardness 2.5, very high density, metallic luster, and cubic cleavage. The apparent green coating may be oxidation or surface alteration.

Identified August 26, 2026More mineral →

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Physical properties

Formation & geological history

If galena, it formed in hydrothermal ore veins, commonly with sphalerite, pyrite, and quartz; deposits range across many geological ages. A precise age and composition cannot be determined visually.

Uses & applications

Galena is an important historical lead ore and occasional collector specimen; small unverified fragments generally have little commercial value.

Geological facts

Galena is unusually heavy for its size and commonly breaks along three directions to produce blocky or cubic surfaces. Green coloration is atypical for fresh galena and may indicate secondary minerals or another material.

Field identification & locations

Test cautiously for exceptional heft, metallic streak, and cubic cleavage; avoid scratching or handling unknown lead-bearing material, and do not ingest it. Common sources include Mississippi Valley–type and hydrothermal deposits worldwide.