Cochise College          Photos of Minerals

                          Geology Home Page                

                          Roger Weller, geology instructor

                          wellerr@cochise.edu
                                  copyright 2006-R.Weller
 

Mineral Information on:
wollastonite


Chemical Group:    silicate

Chemical Formula:   
CaSiO3

Color:  white, light gray, yellow, red, brown          Streak:  white
 

Hardness:  4.5 to 5        Specific Gravity:  2.8 to 2.9         Fracture:  uneven

Cleavage: 2 directions                  Tenacity:  brittle

Luster:  vitreous to pearly

 

Crystal Forms: Monoclinic system
     Often in cleavable masses

Mineral Associations: Wollastonite is a contact metamorphic mineral found in limestones.

Identifying Characteristics:

Uses:

Occurrences:  New York, California, and Ontario, Canada

Toxicity:      when-swallowed- moderate              when inhaled- high

Additional Information: named after a famous mineralogist, W.  H. Wollaston