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Match the mineral with the correct chemical formula

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
        Help!  

Mineral
Chemical Formula
Crystal System
Fayalite   show Orthorhombic  
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Kyanite   Al2SiO5   show
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Sillimanite   Al2SiO5   show
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Andalusite   show Orthorhombic  
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Staurolite   Fe2Al9O6(SiO4)4(OH)2   show
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show ZrSiO4   Tetrahedral  
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show Ca2(Fe3+,Al)Al2O(SiO4)(Si2O7)(OH)   Monoclinic  
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Lawsonite   CaAl2Si2O7(OH)2 . H2O   show
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show Na(Mg,Fe,Li,Al)3Al6(Si6O18)(BO3)3(O,OH,F)4   Hexagonal  
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Cordierite   show Orthorhombic (PseudoHexagonal)  
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Enstatite   Mg2Si2O6 or MgSiO3   show
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show Fe2Si2O6 or FeSiO3   Orthorhombic  
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show CaMgSi2O6   Monoclinic  
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show CaFeSi2O6   Monoclinic  
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show (Ca,Na)(Mg,Fe2+,Fe3+,Al,Ti)(Si,Al)2O6   Monoclinic  
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show (Ca,Na)(Mg,Fe2+,Fe3+,Al)Si2O6   Monoclinic  
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show NaAlSi2O6   Monoclinic  
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show (Mg,Fe)7Si8O22(OH)2   Monoclinic  
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show Ca2(Mg,Fe)5Si8O22(OH)2   Monoclinic  
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Hornblende   show Monoclinic  
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Glaucophane   show Monoclinic  
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Muscovite   KAl2(AlSi3O10)(OH)2   show
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Biotite   show Monoclinic  
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show Mg3Si2O5(OH)4   Monoclinic/Triclinic/Orthorhombic/Hexagonal  
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show Mg3Si4O10(OH)2   Triclinic  
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Chlorite   show Monoclinic/Triclinic  
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Kaolinite   show Triclinic  
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Illite   show Monoclinic  
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Montmorillonite   show Monoclinic  
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Vermiculite   show Monoclinic  
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K-Feldspar   KAlSi3O8   show
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Anorthite   CaAl2Si2O8   show
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show NaAlSi3O8   Triclinic  
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Nepheline   show Hexagonal  
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Quartz   show Hexagonal  
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show CaCO3   Hexagonal  
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Aragonite   CaCO3   show
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Dolomite   CaMg(CO3)2   show
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Anhydrite   CaSO4   show
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Gypsum   CaSO4 . 2H2O   show
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Apatite   show Hexagonal  
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Halite   show Isotropic  
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Flourite   CaF2   show
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show Pbs   Isotropic  
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Chalcopyrite   show Tetrahedral  
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Pyrite   show Isotropic  
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Periclase   show Isotropic  
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Spinel   MgAl2O4   show
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show Fe3O4 or Fe2+Fe3+ 2O4   Isotropic  
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show FeCr2O4   Isotropic  
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Hematite   show Hexagonal  
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show FeTiO3   Hexagonal  
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show TiO2   Tetrahedral  
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Brucite   show Hexagonal  
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Gibbsite   show Monoclinic  
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Goethite   FeO(OH)   show
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Sphalerite   show Cubic  
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Barite   BaSO4   show
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Siderite   show Hexagonal  
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Cassiterite   SnO2   show
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show Sb2S3   Orthorhombic  
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Scheelite   show Tetragonal  
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show KAl3(SO4)2(OH)6   Trigonal  
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Molybdenite   show Hexagonal  
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Pyrolusite   MnO2   show
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show CaSiO3    
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show SiO2 . nH2O    
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Sapphire   Al2O3   show
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Analcime   NaAlSi2O6 . H2O   show
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Tremolite   Ca2Mg5Si8O22(OH)2   show
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Topaz   show  
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show Mg2SiO4   Orthorhombic  
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