Cochise College          Photos of Minerals

                          Geology Home Page                

                          Roger Weller, geology instructor

                          wellerr@cochise.edu
                                  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: