Cochise College          Photos of Minerals

                          Geology Home Page                

                          Roger Weller, geology instructor

                          wellerr@cochise.edu
                                  copyright 2006-R.Weller
 

Mineral Information on:
chromite


Chemical Group:  oxide

Chemical Formula: 
(Mg,Fe)Cr2O4

Color:  black           Streak:  brown         Luster:  metallic

 

Hardness:  5.5         Specific Gravity:   5.09      Fracture:  uneven

Cleavage: none

 

Crystal Forms:  Isometric system
      crystals rare; commonly massive, granular

Mineral Associations:

Identifying Characteristics:

Uses:  chromium ore

Occurrences: found in ultrabasic igneous rocks