Cochise College          Photos of Minerals

                          Geology Home Page                

                          Roger Weller, geology instructor

                                  copyright 2006-R.Weller

Mineral Information on:

Chemical Group:    sulfide

Chemical Formula:   

Color:  brass yellow to bronze yellow; tarnishes gray-iridescent          

Streak:  greenish black        Luster:  metallic 

Transparency:  opaque 


Hardness:  3 to 3.5             Specific Gravity:  5.3 to 5.65               

Fracture:   uneven       Tenacity:  brittle

Crystal Forms and Habits: Hexagonal system
     Usually very slender hair-like crystals.

Mineral Associations: 

Identifying Characteristics:  hair-like crystals in geodes 


Occurrences:  Iowa, Missouri, Wisconsin, Pennsylvania

Toxicity:      when-swallowed-          when inhaled-

Additional Information: