Cochise College          Photos of Minerals

                          Geology Home Page                

                          Roger Weller, geology instructor

                                  copyright 2007-R.Weller

Mineral Information on:

Chemical Group:  silicate (amphibole)

Chemical Formula:  Ca2Mg5Si8O22(OH)2   (a form of tremolite)

Color:   violet to pink (due to the presence of manganese)                                                                     


Hardness:   5 to 6              Specific Gravity:  2.9 to 3.2               

Cleavage:  typical amphibole cleavage (2 directions)


Crystal Forms:  elongated blades in a matrix

Mineral Associations:   talc, white tremolite, light blue diopside

Identifying Characteristics:  mass of pinkish-purple bladed crystals


USA occurrences:
New York
     Gouverneur, Fowler, Balmat, Talcville, Edwards, Stellaville, Elmdale
     Sylvia Lake
     St. Lawrence Valley 

Toxicity:      when-swallowed-                            when inhaled-

Additional Information: