Cochise College          Photos of Minerals

                          Geology Home Page                

                          Roger Weller, geology instructor

                                  copyright 2006-R.Weller

Mineral Information on:

Chemical Group:    sulfide

Chemical Formula:    CuS

Color:  indigo-blue or darker, tarnishes iridescent

Streak: lead-gray to black        Luster:  metallic (opaque)


Hardness:  1.5 to 2       Specific Gravity:  4.6 to 4.76       

Cleavage:  (0001) perfect

Crystal Forms: Hexagonal system
     Crystals are are; often as masses of thin, cleavable plates

Mineral Associations:  bornite, chalcopyrite, chalcocite

Identifying Characteristics:

Uses:  copper ore

Occurrences:  found in zone of secondary enrichment

Toxicity:      when-swallowed- moderate           when inhaled- moderate

Additional Information: