Cochise College          Photos of Minerals

                          Geology Home Page                

                          Roger Weller, geology instructor

                          [email protected]
                                  copyright 2010-R.Weller

Mineral Information on:
groutite

Chemical Group:     hydroxide

Chemical Formula:     MnO(OH)

Color:   blue black                             Streak:  dark brown

Hardness:   5.5              Specific Gravity:    4.14              

Luster:  adamantine to metallic

Tenacity:  brittle

Opaque

Cleavage: 1 direction perfect, 1 direction distinct

Crystal Forms:   acicular, slender prisms

Mineral Associations:

Identifying Characteristics:

Uses:

Occurrences: 

Toxicity:      when-swallowed-                            when inhaled-

Additional Information: