Cochise College          Photos of Minerals

                          Geology Home Page                

                          Roger Weller, geology instructor

                          [email protected]
                                  copyright 2006-R.Weller
 

Mineral Information on:
brochantite

Chemical Group:  sulfate

Chemical Formula:  Cu₄SO₄(OH)₆

Color:     emerald-green to blackish-green          Streak:  pale green

Hardness:  3.5 to 4         Specific Gravity:    3.97                  

Luster:  vitreous            Transparency:  transparent to translucent

Cleavage:  one direction, perfect

Crystal Forms: Monoclinic system
     prismatic to acicular crystals; also drusy, massive, or granular

Mineral Associations:  found in oxidized zone of copper deposits

Identifying Characteristics:

Uses:  copper ore

Occurrences:   Chile, Arizona, Utah