Cochise College Photos of Minerals

Roger Weller, geology instructor

                          [email protected]
                                  copyright 2006-R.Weller

Mineral Information on:
galena

Chemical Group:    sulfide

Chemical Formula:    PbS

Color: lead-gray       Streak: lead-gray

Luster: metallic luster               Transparency: opaque

Hardness: 2.5 Specific Gravity: 7.58

Cleavage: cubic, 3 directions

Crystal Forms and Habits: Isometric system
     Galena most commonly forms cubic crystals, octahedrons, and cubes
     modified by octahedron faces.

Mineral Associations: commonly occurs with fluorite, anglesite, sphalerite

Identifying Characteristics: metallic luster, high density, and the three good
     directions of cleavage

Uses: lead ore

Occurrences: Tri-State district

Toxicity:      when-swallowed- high        when inhaled- very high

Additional Information: