Cochise College          Photos of Minerals

                          Geology Home Page                

                          Roger Weller, geology instructor

                                  copyright 2006-R.Weller

Mineral Information on:

Chemical Group:    sulfate

Chemical Formula:   

Color:  colorless, white, gray, yellowish, pink


Hardness:  2        Specific Gravity:  2.32       

Transparency:  transparent to translucent

Cleavage: 1 direction, very good


Crystal Forms and Habits:  Monoclinic system
     Forms single crystals, crystal clusters that resemble roses, fibrous (satinspar),

    Twin crystals are known as swallowtail twins

Mineral Associations:

Identifying Characteristics:

Uses:  Used for making Plaster of Paris.


Toxicity:      when-swallowed- low          when inhaled- moderate

Additional Information: