Name: Vesuvianite
Composition: Ca10Mg2Al4(SiO4)5(Si2O7)2(OH)4 - Hydrous calcium magnesium aluminum silicate
Specimen Location: Bonanza Flat, Utah
Notes: I believe that United Park City mining has sold this property to developers. Too bad. There was some good collecting around there. the last time I was up there, there were survey markers all over for roads and homes.