Cochise College          Photos of Minerals

                          Geology Home Page                

                          Roger Weller, geology instructor

                          wellerr@cochise.edu
                                  copyright 2007-R.Weller

 

Mineral Information on:
scapolite


Chemical Group:   silicate

Chemical Formula: varies from
(Na,Ca)4Al3(Al,Si)3Si6O24(Cl,CO3,SO4)  to
(Ca,Na)4Al3(Al,Si)3Si6O24(Cl,CO3,SO4)

Color:  white, gray, pale green, light blue, light red, yellow        Luster:  vitreous                                                                       

 

Hardness:  5 to 6               Specific Gravity:  2.65 to 2.74               

Cleavage:  imperfect cleavage

 

Crystal Forms: Tetragonal system
     Crystals are commonly prismatic.

Mineral Associations:  Scapolite forms in contact metamorphic rocks;
     it is associted with diopside, amphibole, garnet, apatite, sphene, zircon

Identifying Characteristics:  square cross section of crystals; 4 directions of cleavage at 450

Uses:  when transparent as a gemstone

Occurrences:  Canada; in the USA in Massachusetts and New York

Toxicity:      when-swallowed-                            when inhaled-

Additional Information:  Scapolite is also known as wernerite.
                  Sometimes scapolite fluoresces orange or yellow under ultraviolet light.