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VIII - Nesosilicates (Garnet Group)
Crystal habit of Grossular Crystal habit of Grossular Grossular

Name   Grossular
Chemistry   Ca3Al2[SiO4]3
Hardness   6.5 - 7.5
Lustre   vitreous - greasy
Colour   colourless, white, light green, red, grey
Streak   white 
Density [g/cm3]   3.5
Crystal habit   isometric, crystals as dodecahedrons
Cleavage, Fracture   fracture conchoidal
other characteristics and occurrences   hessonite = red Fe-grossular
metamorphic contact mineral with calcite (CaCO3), wollastonite (Ca3[Si3O9]), vesuvian (Ca10(Mg,Fe)2Al4[(OH)4|(SiO4)5(Si2O7)2]), diopside (CaMg[Si2O6]) and scapolite ((Na,Ca)4[(Cl,CO3)|(AlSi)4O8]) in regional and contact metamorphism in limestones

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© 2004 Büro für angewandte Mineralogie · Dr. Stephan Rudolph · D-47918 Tönisvorst
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