mineral
Galena (lead sulfide)
Galena, PbS
AI-generated identification · may be incorrectMetallic lead-gray color and bright luster, with blocky cubic cleavage; Mohs hardness 2.5–2.75 and specific gravity about 7.4–7.6. The specimen’s shape and reflective faces are consistent with galena, though an image alone cannot confirm identity.
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Physical properties
Metallic lead-gray color and bright luster, with blocky cubic cleavage; Mohs hardness 2.5–2.75 and specific gravity about 7.4–7.6. The specimen’s shape and reflective faces are consistent with galena, though an image alone cannot confirm identity.
Formation & geological history
Forms in hydrothermal veins and sedimentary-hosted ore deposits, often with sphalerite and other sulfides. Such deposits formed in many geological eras; this specimen’s age and locality cannot be determined from the image.
Uses & applications
Historically the principal ore of lead, used in lead production and related manufacturing; attractive crystals are collected, but lead-bearing specimens should be handled carefully.
Geological facts
Galena’s exceptionally high density is a useful clue. It commonly breaks along three directions at nearly right angles, producing cubic surfaces.
Field identification & locations
Look for a heavy feel, lead-gray metallic appearance, and stepped cubic cleavage; common sources include Missouri, Illinois, and mining districts worldwide. Avoid creating dust and wash hands after handling.
