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:  lead gray with a bluish tinge                     

Streak:  bluish gray on paper, greenish on glazed porcelain


Hardness:  1 to 1.5          Specific Gravity:  4.62 to 4.73

Tenacity:  sectile                 Feel:  greasy

Luster:  bright metallic           

Cleavage:  one direction, perfect


Crystal Forms and Habits: Hexagonal system
    Common crystal form is a hexagonal plate
    Often found in massive form or foliated

Mineral Associations:

Identifying Characteristics:

Uses:  ore of molybdenum, lubricant

Occurrences:  Colorado, Arizona, New Mexico, Utah 

Toxicity:      when-swallowed- moderate       when inhaled- high

Additional Information: