Acanthite
Class : Sulfides and sulfosaltsSubclass : SulfidesCrystal system : MonoclinicChemistry : Ag2SRarity : Fairly common
Size : µm / mm / cm / dm / m
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Actinolite
Class : SilicatesSubclass : InosilicatesCrystal system : MonoclinicChemistry : Ca2(Mg,Fe)5Si8O22(OH)2Rarity : Very common
Adamite
Class : Phosphates, arsenates, vanadatesSubclass : Anhydrous arsenatesCrystal system : OrthorhombicChemistry : Zn2(AsO4)(OH)Rarity : Fairly common
Adelite
Class : Phosphates, arsenates, vanadatesSubclass : Anhydrous arsenatesCrystal system : OrthorhombicChemistry : CaMg(AsO4)(OH)Rarity : Very rare
Adularia
Class : SilicatesSubclass : TectosilicatesCrystal system : MonoclinicChemistry : KAlSi3O8Rarity : Fairly common
Aegyrine
Class : SilicatesSubclass : InosilicatesCrystal system : MonoclinicChemistry : NaFeSi2O6Rarity : Common
Aenigmatite
Class : SilicatesSubclass : InosilicatesCrystal system : TriclinicChemistry : Na2Fe5TiSi6O20Rarity : Rare
Aeschynite
Class : Oxides and hydroxidesSubclass : OxidesCrystal system : OrthorhombicChemistry : (Ce,Ca,Fe,Th)(Ti,Nb)2(O,OH)6Rarity : Very rare
Afghanite
Class : SilicatesSubclass : TectosilicatesCrystal system : TrigonalChemistry : (Na,Ca,K)8(AlSiO4)6(SO4,Cl2,CO3)3 0,5H2ORarity : Rare
Afwillite
Class : SilicatesSubclass : NesosilicatesCrystal system : MonoclinicChemistry : Ca3(SiO3OH)2 2H2ORarity : Very rare
Agardite
Class : Phosphates, arsenates, vanadatesSubclass : Hydrated ArsenatesCrystal system : HexagonalChemistry : (Y,Ca)Cu6(AsO4)3(OH)6 3H2ORarity : Very rare
Agate
Class : SilicatesSubclass : TectosilicatesCrystal system : TrigonalChemistry : SiO2Rarity : Very common
Agrinierite
Class : Oxides and hydroxidesSubclass : Uranyl hydroxidesCrystal system : MonoclinicChemistry : (K2,Ca,Sr)U3O10 4H2ORarity : Very rare
Aquamarine
Class : SilicatesSubclass : CyclosilicatesCrystal system : HexagonalChemistry : Be3Al2Si6O18Rarity : Common
Aikinite
Class : Sulfides and sulfosaltsSubclass : SulfosaltsCrystal system : OrthorhombicChemistry : PbCuBiS3Rarity : Uncommon
Akermanite
Class : SilicatesSubclass : SorosilicatesCrystal system : TetragonalChemistry : CaMgSiO7Rarity : Rare
Alabandite
Class : Sulfides and sulfosaltsSubclass : SulfidesCrystal system : CubicChemistry : MnSRarity : Fairly common
Albite
Class : SilicatesSubclass : TectosilicatesCrystal system : TriclinicChemistry : NaAlSi3O8Rarity : Very common
Algodonite
Class : Sulfides and sulfosaltsSubclass : ArsenidesCrystal system : HexagonalChemistry : Cu6AsRarity : Rare
Allanite
Class : SilicatesSubclass : SorosilicatesCrystal system : MonoclinicChemistry : (Ce,Ca)2(Al,Fe)3(SiO4)3(OH)Rarity : Uncommon
Alloclasite
Class : Sulfides and sulfosaltsSubclass : SulfidesCrystal system : MonoclinicChemistry : (CoFe)AsSRarity : Rare
Allophane
Class : SilicatesSubclass : PhyllosilicatesCrystal system : AmorphousChemistry : Al2SiO5 3H2ORarity : Fairly common
Almandine
Class : SilicatesSubclass : NesosilicatesCrystal system : CubicChemistry : Fe3Al2Si3O12Rarity : Common
Altaite
Class : Sulfides and sulfosaltsSubclass : TelluridesCrystal system : CubicChemistry : PbTeRarity : Rare
Aluminite
Class : Sulphates, chromates, molybdatesSubclass : Hydrated sulfatesCrystal system : MonoclinicChemistry : Al2(SO4)(OH)4 7H2ORarity : Uncommon
Alumohydrocalcite
Class : Carbonates, Nitrates, BoratesSubclass : Hydrous carbonatesCrystal system : TriclinicChemistry : CaAl2(CO3)2(OH)4 3H2ORarity : Uncommon
Alunite
Class : Sulphates, chromates, molybdatesSubclass : Anhydrous sulphatesCrystal system : TrigonalChemistry : KAl3(SO4)2(OH)6Rarity : Fairly common
Alunogen
Class : Sulphates, chromates, molybdatesSubclass : Hydrated sulphatesCrystal system : TriclinicChemistry : Al2(SO4)3 17H2ORarity : Uncommon
Amarantite
Class : Sulphates, chromates, molybdatesSubclass : Hydrated sulphatesCrystal system : TriclinicChemistry : Fe2(SO4)2O 7H2ORarity : Rare
Amazonite
Class : SilicatesSubclass : TectosilicatesCrystal system : TriclinicChemistry : KAlSi3O8Rarity : Rare
Amblygonite
Class : Phosphates, arsenates, vanadatesSubclass : Anhydrous phosphatesCrystal system : TriclinicChemistry : LiAlF(PO4)Rarity : Uncommon
Amber
Class : Organic compoundsSubclass : -Crystal system : AmorphousChemistry : C,H,ORarity : Rare to common
Amesite
Class : SilicatesSubclass : PhyllosilicatesCrystal system : TriclinicChemistry : Mg2AlSiAlO5(OH)4Rarity : Rare
Amethyst
Class : SilicatesSubclass : TectosilicatesCrystal system : TrigonalChemistry : SiO2Rarity : Quite common
Ametrine
Class : SilicatesSubclass : TectosilicatesCrystal system : TrigonalChemistry : SiO2Rarity : Rare
Amphibole
Class : SilicatesSubclass : InosilicatesCrystal system : Orthorhombic or monoclinicChemistry : WX2Y5Si8O22(OH)2Rarity : Very common
Analcime
Class : SilicatesSubclass : TectosilicatesCrystal system : TriclinicChemistry : NaAlSi2O6 H2ORarity : Quite common
Anapaite
Class : Phosphates, arsenates, vanadatesSubclass : Hydrated phosphatesCrystal system : TriclinicChemistry : Ca2Fe(PO4)2 4H2ORarity : Very rare
Anatase
Class : Oxides and hydroxidesSubclass : OxidesCrystal system : TetragonalChemistry : TiO2Rarity : Rare
Ancylite
Class : Carbonates, Nitrates, BoratesSubclass : Hydrated carbonatesCrystal system : OrthorhombicChemistry : SrCe(CO3)2(OH) H2ORarity : Fairly common
Andalusite
Class : SilicatesSubclass : NesosilicatesCrystal system : OrthorhombicChemistry : Al2SiO5Rarity : Very common
Andersonite
Class : Carbonates, Nitrates, BoratesSubclass : Uranyl carbonatesCrystal system : TrigonalChemistry : Na2Ca(UO2)(CO3)3 6H2ORarity : Rare
Andesine
Class : SilicatesSubclass : TectosilicatesCrystal system : TriclinicChemistry : (Na,Ca)(Al,Si)4O8Rarity : Very common
Andorite
Class : Sulfides and sulfosaltsSubclass : SulfosaltsCrystal system : OrthorhombicChemistry : PbAgSb3S6Rarity : Very rare to rare
Andradite
Class : SilicatesSubclass : NesosilicatesCrystal system : CubicChemistry : Ca3(Fe,Ti)2Si3O12Rarity : Common
Anglesite
Class : Sulphates, molybdates, chromatesSubclass : Anhydrous sulphatesCrystal system : OrthorhombicChemistry : PbSO4Rarity : Common
Anhydrite
Class : Sulphates, chromates, molybdatesSubclass : Anhydrous sulfatesCrystal system : OrthorhombicChemistry : CaSO4Rarity : Very common
Ankerite
Class : Carbonates, Nitrates, BoratesSubclass : Anhydrous carbonatesCrystal system : TrigonalChemistry : CaFe(CO3)2Rarity : Very common
Annabergite
Class : Phosphates, arsenates, vanadatesSubclass : Hydrated ArsenatesCrystal system : MonoclinicChemistry : Ni3(AsO4)2 8H2ORarity : Rare
Anorthite
Class : SilicatesSubclass : TectosilicatesCrystal system : TriclinicChemistry : CaAl2Si2O8Rarity : Uncommon
Anorthoclase
Class : SilicatesSubclass : TectosilicatesCrystal system : TriclinicChemistry : (Na,K)AlSi3O8Rarity : Fairly common
Anthophyllite
Class : SilicatesSubclass : InosilicatesCrystal system : OrthorhombicChemistry : (Mg,Fe)7Si8O22(OH)2Rarity : Uncommon
Antimony
Class : ElementsSubclass : MetalloidsCrystal system : TrigonalChemistry : SbRarity : Rare
Antlerite
Class : Sulphates, chromates, molybdatesSubclass : Anhydrous sulfatesCrystal system : OrthorhombicChemistry : Cu3SO4(OH)4Rarity : Rare
Apachite
Class : SilicatesSubclass : CyclosilicatesCrystal system : MonoclinicChemistry : Cu9Si10O29 11H2ORarity : Very rare
Apatite
Class : Phosphates, arsenates, vanadatesSubclass : Anhydrous phosphatesCrystal system : HexagonalChemistry : Ca5(PO4)3(F,Cl,OH)Rarity : Very common
Apophyllite
Class : SilicatesSubclass : PhyllosilicatesCrystal system : TetragonalChemistry : (K,Na)Ca4Si8O20(OH,F) 8H2ORarity : Uncommon
Apuanite
Class : Oxides and hydroxidesSubclass : OxidesCrystal system : TetragonalChemistry : Fe5Sb4O12SRarity : Very rare
Aragonite
Class : Carbonates, nitrates, boratesSubclass : Anhydrous carbonatesCrystal system : OrthorhombicChemistry : CaCO3Rarity : Very common
Ardennite
Class : SilicatesSubclass : SorosilicatesCrystal system : OrthorhombicChemistry : Mn4(Al,Mg)6(SiO4)2(Si3O10)[(As,V)O4](OH)6Rarity : Rare
Arfvedsonite
Class : SilicatesSubclass : InosilicatesCrystal system : MonoclinicChemistry : Na3Fe5Si8O22(OH)2Rarity : Uncommon
Silver (argent)
Class : ElementsSubclass : MetalsCrystal system : CubicChemistry : AgRarity : Uncommon
Argentite
Class : Sulfides and sulfosaltsSubclass : SulfidesCrystal system : CubicChemistry : Ag2SRarity : Uncommon
Argentopyrite
Class : Sulfides and sulfosaltsSubclass : SulfidesCrystal system : OrthorhombicChemistry : AgFe2S3Rarity : Uncommon to rare
Argyrodite
Class : Sulfides and sulfosaltsSubclass : SulfidesCrystal system : OrthorhombicChemistry : Ag8GeS6Rarity : Very rare
Arrojadite
Class : Phosphates, arsenates, vanadatesSubclass : Anhydrous phosphatesCrystal system : MonoclinicChemistry : KNa4CaFe10Mn4Al(PO4)12(OH)2Rarity : Uncommon to rare
Arsendescloizite
Class : Phosphates, arsenates, vanadatesSubclass : Anhydrous arsenatesCrystal system : OrthorhombicChemistry : PbZn(AsO4)(OH)Rarity : Rare to very rare
Arsenic
Class : ElementsSubclass : MetalloidsCrystal system : TrigonalChemistry : AsRarity : Uncommon
Arseniosiderite
Class : Phosphates, arsenates, vanadatesSubclass : Hydrated arsenatesCrystal system : MonoclinicChemistry : Ca2Fe3O2(AsO4)3 3H2ORarity : Uncommon
Arsenolite
Class : Oxides and hydroxidesSubclass : OxidesCrystal system : CubicChemistry : As2O3Rarity : Fairly common
Arsenopyrite
Class : Sulfides and sulphosaltsSubclass : SulfidesCrystal system : MonoclinicChemistry : FeAsSRarity : Very common
Arsentsumebite
Class : Phosphates, arsenates, vanadatesSubclass : Anhydrous arsenatesCrystal system : MonoclinicChemistry : Pb2Cu(AsO4)(SO4)(OH)Rarity : Very rare
Arthurite
Class : Phosphates, arsenates, vanadatesSubclass : Hydrated arsenatesCrystal system : MonoclinicChemistry : CuFe2(AsO4)2(OH)2 4H2ORarity : Rare
Artinite
Class : Carbonates, nitrates, boratesSubclass : Hydrated carbonatesCrystal system : MonoclinicChemistry : Mg2CO3(OH)2 3H2ORarity : Rare
Asbolane
Class : Oxides and hydroxidesSubclass : Hydroxides and hydratesCrystal system : TrigonalChemistry : (Co,Ni)xMn(O,OH)4 nH2ORarity : Rare
Astrophyllite
Class : SilicatesSubclass : InosilicatesCrystal system : TriclinicChemistry : (K,Na)3(Fe,Mn)7Ti2Si8O24(O,OH)7Rarity : Uncommon
Atacamite
Class : HalidesSubclass : OxychloridesCrystal system : OrthorhombicChemistry : Cu2Cl(OH)3Rarity : Uncommon
Augelite
Class : Phosphates, arsenates, vanadatesSubclass : Anhydrous phosphatesCrystal system : MonoclinicChemistry : Al2(PO4)(OH)3Rarity : Fairly rare
Augite
Class : SilicatesSubclass : InosilicatesCrystal system : MonoclinicChemistry : (Ca,Mg,Fe)2(Si,Al)2O6Rarity : Very common
Aurichalcite
Class : Carbonates, nitrates, boratesSubclass : Anhydrous carbonatesCrystal system : MonoclinicChemistry : (Zn,Cu)5(CO3)2(OH)6Rarity : Uncommon
Austinite
Class : Phosphates, arsenates, vanadatesSubclass : Anhydrous arsenatesCrystal system : OrthorhombicChemistry : CaZn(AsO4)(OH)Rarity : Uncommon
Autunite
Class : Phosphates, arsenates, vanadatesSubclass : PhosphatesCrystal system : OrthorhombicChemistry : Ca(UO2)2(PO4)2 10H2ORarity : Common
Axinite
Class : SilicatesSubclass : SorosilicatesCrystal system : TriclinicChemistry : (Ca,Fe,Mn,Mg)3Al2BSi4O15(OH)Rarity : Uncommon
Azurite
Class : Carbonates, nitrates, boratesSubclass : Anhydrous carbonatesCrystal system : MonoclinicChemistry : Cu2(CO3)2(OH)2Rarity : Common