Cochise College          Photos of Minerals

                          Geology Home Page                

                          Roger Weller, geology instructor

                                  copyright 2006-R.Weller

Mineral Information on:

Chemical Group:    tungstate

Chemical Formula:   

Color:  white, yellowish white, pale yellow, brownish, greenish, reddish                                                                         

Streak:  white          Luster:  vitreous to adamantine

Transparency:     transparent to translucent


Hardness:  4.5 to 5                 Specific Gravity:  5.91 to 6.1                

Fracture: uneven         Cleavage:   (111) most distinct


Crystal Forms: Tetragonal-pyramidal
      Crystals may be octahedral or tabular

Mineral Associations:  found in pegmatite veins 

Identifying Characteristics:  fluoresces white-blue

Uses:  tungsten ore

Occurrences:   Dragoon in Cochise County, Arizona; also Connecticut, South Dakota

Toxicity:      when-swallowed-                  when inhaled-

Additional Information: