Cochise College          Photos of Minerals

                          Geology Home Page                

                          Roger Weller, geology instructor

                          wellerr@cochise.edu
                                  copyright 2006-R.Weller
 

Mineral Information on:
dioptase


Chemical Group:    silicate

Chemical Formula:   
H2CuSiO4

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: