mineral
Likely galena-bearing metamorphic sulfide ore
Galena (PbS), possibly with pyrite and/or sphalerite in a schistose host
AI-generated identification · may be incorrectDark gray to lead-gray, strongly metallic and reflective, with irregular fractured surfaces; galena has Mohs hardness 2.5–2.75, cubic cleavage, and high specific gravity (~7.5). The image’s layered, foliated texture suggests associated metamorphic rock rather than a single crystal.
Identified More mineral →
Explore Likely galena-bearing metamorphic sulfide ore in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Dark gray to lead-gray, strongly metallic and reflective, with irregular fractured surfaces; galena has Mohs hardness 2.5–2.75, cubic cleavage, and high specific gravity (~7.5). The image’s layered, foliated texture suggests associated metamorphic rock rather than a single crystal.
Formation & geological history
Likely formed in a hydrothermal sulfide vein or massive-sulfide deposit, later deformed or metamorphosed; age cannot be determined from appearance alone. Common hosts include schist, quartz veins, carbonate rocks, and volcanic sequences.
Uses & applications
Galena is the principal lead ore and historically an important silver source; attractive specimens are collected, but it is not normally used as jewelry because lead sulfide is toxic.
Geological facts
Fresh galena typically shows brilliant metallic luster and sharp cubic cleavage; tarnished surfaces may appear dull gray or iridescent. Avoid grinding, licking, or prolonged handling, and wash hands afterward.
Field identification & locations
Look for exceptional heft, metallic gray color, cubic cleavage, and a dark streak; a streak, hardness, density, and chemical test are needed for confirmation. Galena occurs worldwide, including Missouri, Idaho, Colorado, Australia, Peru, and the United Kingdom.
