Cochise College          Photos of Minerals

                          Geology Home Page                

                          Roger Weller, geology instructor

                          [email protected]
                                  copyright 2006-R.Weller
 

Mineral Information on:
chalcocite

Chemical Group:    sulfide

Chemical Formula:    Cu₂S

Color:  blackish lead-gray, often tarnished blue or green                   

Streak:  blackish lead-gray    Luster:  metallic

Transparency:  opaque

Hardness:  2.5 to 3          Specific Gravity:  5.5 t0 5.8                 

Fracture:  conchoidal 

Tenacity:  somewhat sectile

Cleavage:  indistinct

Crystal Forms and Habits:  Orthorhombic system 

Mineral Associations:

Identifying Characteristics: 

Uses:  copper ore

Occurrences: 

Toxicity:      when-swallowed-          when inhaled-

Additional Information: