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:  pale yellow, gray, brick red               Streak:  white  

Taste:  slightly saline             Fracture:   conchoidal


Hardness:  2.5 to 3            Specific Gravity:  2.7 to 2.85               

Cleavage:   one direction, perfect  


Crystal Forms: Monoclinic system
   tabular crystals

Mineral Associations:  occurs in salt deposits 

Identifying Characteristics: 


Occurrences:   Verde Valley, Arizona and Borax Lake, California

Toxicity:             when inhaled-

Additional Information:  partially dissolvable by water