Cochise College          Photos of Minerals

                          Geology Home Page                

                          Roger Weller, geology instructor

                          [email protected]
                                  copyright 2010-R.Weller

Mineral Information on:
tennantite

Chemical Group:     sulfide

Chemical Formula:    (Cu,Fe,Zn,Ag)₁₂As₄S₁₃

Color:   black to steel gray; darker than tetrahedrite                                                                      

Streak:  black to reddish black

Hardness:   3 to 4              Specific Gravity:     4.6            

Fracture:  subconchoidal

Luster:  metallic

Opaque

Crystal Forms:  Isometric System: forms tetrahedrons

Mineral Associations:

Identifying Characteristics:

Uses:  may contain silver

Occurrences: 

Toxicity:      when-swallowed-                            when inhaled-

Additional Information: