Cochise College          Photos of Minerals

                          Geology Home Page                

                          Roger Weller, geology instructor

                                  copyright 2010-R.Weller


Mineral Information on:

Chemical Group:   sulfide

Chemical Formula:   

Color:   blackish lead-gray                       Streak:


Hardness:     2.5            Specific Gravity:   7.2 to 7.4               



Crystal Forms: Isometric System; cubes and octahedrons

Habits: dendritic earthy masses

Mineral Associations:

Identifying Characteristics:

Uses:  silver ore

Occurrences:  Mexico, Nevada

Toxicity:      when-swallowed-                            when inhaled-

Additional Information:  also known as silver glance