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 incorrectGray-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 More mineral →
Explore Small metallic mineral fragment, possibly galena or slag-like sulfide in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
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.
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.
