Cochise College          Photos of Minerals

                          Geology Home Page                

                          Roger Weller, geology instructor

                                  copyright 2006-R.Weller

Mineral Information on:

Chemical Group:   oxide  

Chemical Formula:  

Color:  deep red, orange-yellow           Streak:  orange-yellow


Hardness:    4 to 4.5             Specific Gravity:   5.43 to 5.7

Fracture:  sub-conchoidal         Transparency:  translucent to sub-translucent

Luster:  sub-adamantine

Cleavage:  (0001) perfect 


Crystal Forms: Hexagonal-hemimorphic
     Crystals rare

Mineral habits:  foliated massive, granular 

Mineral Associations:  franklinite, willemite

Identifying Characteristics:

Uses:  zinc ore

Occurrences:  Franklin, New Jersey

Toxicity:      when-swallowed-                            when inhaled-

Additional Information: