Galena

PbS

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Galena is the principal ore of lead and one of the most widely distributed sulfide minerals. It commonly occurs with sphalerite, calcite, and fluorite. Its perfect cubic cleavage and high specific gravity make it easily identifiable.

Crystal System	Cubic (Isometric)
Mineral Class	02 Sulfides and Sulfosalts
Mohs Hardness	2.5-2.8
Specific Gravity	7.40-7.60
Color	Lead-gray
Luster	Metallic
Streak	Lead-gray
Cleavage	Perfect cubic {001}
Fracture	Subconchoidal
Transparency	Opaque
Crystal Habit	Cubic, octahedral