Cochise College          Photos of Minerals

                          Geology Home Page                

                          Roger Weller, geology instructor

                                  copyright 2006-R.Weller

Mineral Information on:

Chemical Group:    silicate

Chemical Formula:   

Color:  emerald-green     


Hardness:   5       Specific Gravity:  3.28 to 3.35                 

Fracture:  conchoidal to uneven

Cleavage: present


Crystal Forms: Tri-rhombohedral
      prismatic crystals, crystalline aggregates, massive

Mineral Associations:  occurs with copper deposits

Identifying Characteristics:

Uses: a rare mineral-mostly as mineral specimens

Occurrences:  Clifton, Arizona and Africa 

Toxicity:      when-swallowed- low          when inhaled- high

Additional Information: