Galena

If it’s blocky, silvery, and heavy, it’s galena.

Physical Properties
Chemical Formula PbS
Class Sulfide
Crystal system Cubic
Habit Cubic
Cubes modified by octahedra
Color Lead-grey
Silvery
Hardness 2.5
Specific gravity 7.6
Cleavage/fracture Perfect {100}
“Cubic”
“Blocky”
Fracture Subconchoidal
Luster Metallic
Transparency Opaque
Streak Lead-grey
Twinning Penetration
Contact
after Perkins, 357

Galena in Hand Sample

Four small samples of galena

Further Reading

Galena at webmineral.com

Galena at mindat.org