Galena
Galena sample
Galena has metallic to lead-gray, cube-shaped crystals that break into cubic, right-angled fragments. It is an ore—a mineral of economic value—that was once mined in southeastern Kansas for its lead content. The Tri-State mining district, which includes the far southeastern corner of the state, was formerly one of the most important lead- and zinc-producing areas in the world.
- Chemical compound: lead sulfide
- Chemical formula: PbS (Pb = lead, S = sulfur)
- Color: lead gray
- Streak: gray-black
- Luster: metallic
- Hardness: 2.5
- Specific gravity: 7.5
- Amount of transparency: opaque