Cochise College          Photos of Minerals

                          Geology Home Page                

                          Roger Weller, geology instructor

                          wellerr@cochise.edu
                                  copyright 2006-R.Weller
 

Mineral Information on:
glauconite


Chemical Group:    silicate   

Chemical Formula:   
K(Fe,Mg,Al)2(Si4O10)(OH)

Color:  dull green                Streak:   

Taste:               Fracture:  

 

Hardness:              Specific Gravity:               

Cleavage:     

 

Crystal Forms:  occurs in colloidal and crystalline forms

Mineral Associations: 

Identifying Characteristics:  usually sand-grain size agglomerates

Uses: 

Occurrences:  found in large quantities in ocean sediments near continental slopes 

Toxicity:             when inhaled-

Additional Information: