Cochise College          Photos of Minerals

                          Geology Home Page                

                          Roger Weller, geology instructor

                                  copyright 2006-R.Weller

Mineral Information on:

Chemical Group:    phosphate

Chemical Formula:   

Color:  sky-blue, bluish-green to apple green            Streak:  white to pale green


Hardness:  5 to 6        Specific Gravity:   2.6 to 2.8

Luster:  waxy                

Fracture:  conchoidal to smooth

Cleavage:  rarely seen because material is usually massive


Crystal Forms:  Triclinic system
      Crystals are very rare; usually dense, massive and cryptocrystalline
      Occurs as small veins or crusts

Mineral Associations:

Identifying Characteristics:

Uses: jewelry and carvings

Occurrences: a secondary mineral found often in the weathered zone of a
copper deposit. The key ingredient needed is a phosphate source which may
be apatite in decomposing feldspar.