Cochise College          Photos of Minerals

                          Geology Home Page                

                          Roger Weller, geology instructor

                                  copyright 2007-R.Weller


Mineral Information on:

Chemical Group:    sulfate

Chemical Formula:   

Color:   deep blue                                                                      


Hardness:  2.5             Specific Gravity:    5.4             

Cleavage:  (100) perfect


Crystal Forms:  Monoclinic system

Mineral Associations:  found in lead-copper deposits

Identifying Characteristics: strong dark blue color

Uses:   a rare mineral

Occurrences:    Siberia, Spain, South West Africa, Australia; in the USA at California and Utah

Toxicity:      when-swallowed-                            when inhaled-

Additional Information: