Cochise College          Photos of Minerals

                          Geology Home Page                

                          Roger Weller, geology instructor

                          wellerr@cochise.edu
                                  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: