Fairfieldite
Class : Phosphates, arsenates, vanadatesSubclass : Hydrated phosphatesCrystal system : TriclinicChemistry : Ca2(Mn,Fe)(PO4)2 2H2ORarity : Rare
Size : µm / mm / cm / dm / m
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Famatinite
Class : Sulfides and sulfosaltsSubclass : SulfidesCrystal system : TetragonalChemistry : Cu3SbS4Rarity : Rare
Faujasite
Class : SilicatesSubclass : TectosilicatesCrystal system : CubicChemistry : (Na2,Ca)Al2Si4O12 8H2ORarity : Very rare
Fayalite
Class : SilicatesSubclass : NesosilicatesCrystal system : OrthorhombicChemistry : Fe2SiO4Rarity : Common
Feldspar
Class : SilicatesSubclass : TectosilicatesCrystal system : VariableChemistry : XZ4O8Rarity : Very common
Feldpathoid
Class : SilicatesSubclass : TectosilicatesCrystal system : VariableChemistry : VariableRarity : Quite common
Iron (Fer)
Class : ElementsSubclass : MetalsCrystal system : CubicChemistry : FeRarity : Rare
Fergusonite
Class : Oxides and hydroxidesSubclass : OxidesCrystal system : TetragonalChemistry : YNbO4Rarity : Uncommon
Ferrierite
Class : SilicatesSubclass : TectosilicatesCrystal system : OrthorhombicChemistry : (Na,K)2MgAl3Si15O36(OH) 9H2ORarity : Rare
Ferrimolybdite
Class : Sulfates, chromates, molybdatesSubclass : MolybdatesCrystal system : OrthorhombicChemistry : Fe2(MoO4)3 8H2ORarity : Uncommon
Ferrinatrite
Class : Sulfates, chromates, molybdatesSubclass : Hydrated sulfatesCrystal system : TrigonalChemistry : Na3Fe(SO4)3 3H2ORarity : Uncommon
Ferrisicklerite
Class : Phosphates, arsenates, vanadatesSubclass : Anhydrous phosphatesCrystal system : OrthorhombicChemistry : Li(Fe,Mn)PO4Rarity : Rare
Ferritungstite
Class : Sulfates, chromates, molybdatesSubclass : TungstatesCrystal system : CubicChemistry : (W,Fe)2(O,OH)6 nH2ORarity : Rare
Ferrosilite
Class : SilicatesSubclass : InosilicatesCrystal system : OrthorhombicChemistry : FeSiO3Rarity : Common
Fibroferrite
Class : Sulfates, chromates, molybdatesSubclass : Hydrated sulfatesCrystal system : TrigonalChemistry : Fe(SO4)(OH) 5H2ORarity : Rare to uncommon
Fiedlerite
Class : HalidesSubclass : OxychloridesCrystal system : MonoclinicChemistry : Pb3Cl4F(OH) H2ORarity : Very rare
Fizelyite
Class : Sulfides and sulfosaltsSubclass : SulfosaltsCrystal system : MonoclinicChemistry : Pb14Ag5Sb21S48Rarity : Very rare
Fluckite
Class : Phosphates, arsenates, vanadatesSubclass : Hydrated arsenatesCrystal system : TriclinicChemistry : CaMn(AsO3OH)2 2H2ORarity : Very rare
Fluorite
Class : HalidesSubclass : FluoridesCrystal system : CubicChemistry : CaF2Rarity : Very common
Fornacite
Class : Sulfates, chromates, molybdatesSubclass : ChromatesCrystal system : MonoclinicChemistry : Pb2Cu(AsO4)(CrO4)(OH)Rarity : Very rare
Forsterite
Class : SilicatesSubclass : NesosilicatesCrystal system : OrthorhombicChemistry : Mg2SiO4Rarity : Very common
Fourmarierite
Class : Oxides and hydroxidesSubclass : Uranyl hydroxidesCrystal system : OrthorhombicChemistry : Pb(UO2)4O3(OH)4 4H2ORarity : Rare
Francevillite
Class : Phosphates, arsenates, vanadatesSubclass : Uranyl vanadatesCrystal system : OrthorhombicChemistry : (Ba,Pb)(UO2)2(VO4)2 5H2ORarity : Very rare
Franckeite
Class : Sulfides and sulfosaltsSubclass : SulfidesCrystal system : TriclinicChemistry : FePb5Sn3Sb2S14Rarity : Rare
Franklinite
Class : Oxides and hydroxidesSubclass : OxidesCrystal system : CubicChemistry : ZnFe2O4Rarity : Rare to very rare
Freibergite
Class : Sulfides and sulfosaltsSubclass : SulfidesCrystal system : CubicChemistry : (Ag,Cu,Fe)12(Sb,As)4S13Rarity : Common
Freieslebenite
Class : Sulfides and sulfosaltsSubclass : SulfosaltsCrystal system : MonoclinicChemistry : AgPbSbS3Rarity : Rare
Fresnoite
Class : SilicatesSubclass : SorosilicatesCrystal system : TetragonalChemistry : Ba2TiOSi2O7Rarity : Very rare
Friedelite
Class : SilicatesSubclass : PhyllosilicatesCrystal system : MonoclinicChemistry : Mn8Si6O15(OH,Cl)10Rarity : Quite common
Frondelite
Class : Phosphates, arsenates, vanadatesSubclass : Anhydrous phosphatesCrystal system : OrthorhombicChemistry : MnFe4(PO4)3(OH)5Rarity : Rare
Fuchsite
Class : SilicatesSubclass : PhyllosilicatesCrystal system : MonoclinicChemistry : KAl2(Si3Al)O10(OH,F)2Rarity : Rare