Galena

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Mineral class: Sulfide
Composition: Lead sulfide, PbS
Hardness: 2.6
Luster: Metallic
Color: Lead-grey, silver-grey, blue-black
Streak: Dark grey or black
Cleavage: 3 perfect planes at 90 degrees
Specific Gravity: 7.2-7.6
Crystal form: Cubic or granular masses
Environment: Hydrothermal veins
Uses: The principal ore of lead. Often contains silver.
Comments:
Will mark paper.

Fuses easily, leaving yellow stain.

Soluble in HCl, evolving H₂S gas.

Soluble in HNO₃, producing sulfur and lead sulfate.

Small globules of metallic lead collect on the surface if a fragment is held in a candle flame.

Common in Missouri, Oklahoma and Kansas, as well as Cumberland, England; Germany; Idaho and Utah.
[galena.jpg] [galenaSilver.jpg]

Mineral class:	Sulfide
Composition:	Lead sulfide, PbS
Hardness:	2.6
Luster:	Metallic
Color:	Lead-grey, silver-grey, blue-black
Streak:	Dark grey or black
Cleavage:	3 perfect planes at 90 degrees
Specific Gravity:	7.2-7.6
Crystal form:	Cubic or granular masses
Environment:	Hydrothermal veins
Uses:	The principal ore of lead. Often contains silver.
Comments:	Will mark paper. Fuses easily, leaving yellow stain. Soluble in HCl, evolving H₂S gas. Soluble in HNO₃, producing sulfur and lead sulfate. Small globules of metallic lead collect on the surface if a fragment is held in a candle flame. Common in Missouri, Oklahoma and Kansas, as well as Cumberland, England; Germany; Idaho and Utah.