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: white, cream, pink              Streak:   white

Luster:  vitreous, pearly on cleavage surfaces


Hardness:  3.5 to 4       Specific Gravity:   2.1 to 2.2           

Cleavage:  (010) perfect


Crystal Forms:  Monoclinic system
      Tends to form characteristic sheath-like bundles of crystals

Mineral Associations:  heulandite

Identifying Characteristics:


Occurrences: in cavities within basalt 

Toxicity:      when-swallowed-                            when inhaled-

Additional Information: