Tacharanite
Class : SilicatesSubclass : InosilicatesCrystal system : MonoclinicChemistry : Ca12Al2Si18O51 18H2ORarity : Uncommon
Size : µm / mm / cm / dm / m
Click on the photo for more information
Tadzhikite
Class : SilicatesSubclass : SorosilicatesCrystal system : MonoclinicChemistry : Ca3(Y,Ce)2(Ti,Al,Fe)B4Si4O22(O,OH)2Rarity : Very rare
Taenite
Class : ElementsSubclass : MetalsCrystal system : CubicChemistry : Ni,FeRarity : Rare
Takovite
Class : Carbonates, nitrates, boratesSubclass : Hydrated carbonatesCrystal system : TrigonalChemistry : Ni6Al2(CO3)(OH)16 4H2ORarity : Rare to very rare
Talc
Class : SilciatesSubclass : PhyllosilicatesCrystal system : MonoclinicChemistry : Mg3Si4O10(OH)2Rarity : Common
Talmessite
Class : Phosphates, arsenates, vanadatesSubclass : Hydrated arsenatesCrystal system : TriclinicChemistry : Ca2Mg(AsO4)2 2H2ORarity : Uncommon
Tamarugite
Class : Sulfates, chromates, molybdatesSubclass : Hydrated sulfatesCrystal system : MonoclinicChemistry : NaAl(SO4)2 6H2ORarity : Rare
Tantalite
Class : Oxides and hydroxidesSubclass : OxidesCrystal system : OrthorhombicChemistry : (Fe2+,Mn2+,Mg2+)(Ta,Nb)2O6Rarity : Uncommon
Tanzanite
Class : SilicatesSubclass : SorosilicatesCrystal system : OrthorhombicChemistry : Ca2Al3(SiO4)3(OH)Rarity : Very rare
Tapiolite
Class : Oxides and hydroxidesSubclass : OxidesCrystal system : TetragonalChemistry : (Fe,Mn)(Ta,Nb)2O6Rarity : Fairly common
Tarbuttite
Class : Phosphates, arsenates, vanadatesSubclass : Anhydrous phosphatesCrystal system : TriclinicChemistry : Zn2PO4(OH)Rarity : Very rare
Teallite
Class : Sulfides and sulfosaltsSubclass : SulfidesCrystal system : OrthorhombicChemistry : PbSnS2Rarity : Very rare
Tellurium
Class : ElementsSubclass : Non-metalsCrystal system : TrigonalChemistry : TeRarity : Rare
Tellurite
Class : Oxides and hydroxidesSubclass : OxidesCrystal system : OrthorhombiqueChemistry : TeO2Rarity : Very rare
Tennantite
Class : Sulfides and sulfosaltsSubclass : SulfidesCrystal system : CubicChemistry : Cu12As4S13Rarity : Fairly common
Tenorite
Class : Oxides and hydroxidesSubclass : OxidesCrystal system : MonoclinicChemistry : CuORarity : Fairly common
Tephroite
Class : SilicatesSubclass : NesosilicatesCrystal system : OrthorhombicChemistry : Mn2SiO4Rarity : Uncommon
Terlinguaite
Class : HalidesSubclass : OxychloridesCrystal system : MonoclinicChemistry : Hg2ClORarity : Very rare
Tetradymite
Class : Sulfides and sulfosaltsSubclass : TelluridesCrystal system : TrigonalChemistry : Bi2Te2SRarity : Uncommon
Tetrahedrite
Class : Sulfides and sulphosaltsSubclass : SulfidesCrystal system : CubicChemistry : Cu12Sb4S13Rarity : Common
Thaumasite
Class : Sulfates, chromates, molybdatesSubclass : Hydrated sulfatesCrystal system : HexagonalChemistry : Ca3Si(SO4)(CO3)(OH)6 12H2ORarity : Uncommon
Thenardite
Class : Sulfates, chromates, molybdatesSubclass : Anhydrous sulfatesCrystal system : OrthorhombicChemistry : Na2SO4Rarity : Uncommon
Thomsenolite
Class : HalidesSubclass : FluoridesCrystal system : MonoclinicChemistry : NaCaAlF6 H2ORarity : Rare
Thomsonite
Class : SilicatesSubclass : TectosilicatesCrystal system : OrthorhombicChemistry : NaCa2Al5Si5O20 6H2ORarity : Fairly common
Thorianite
Class : Oxides and hydroxidesSubclass : OxidesCrystal system : CubicChemistry : ThO2Rarity : Quite common
Thorite
Class : SilicatesSubclass : NesosilicatesCrystal system : TetragonalChemistry : ThSiO4Rarity : Quite common
Thorogummite
Class : SilicatesSubclass : NesosilicatesCrystal system : TetragonalChemistry : (Th,U)(SiO4)(OH)4Rarity : Rare
Thortveitite
Class : SilicatesSubclass : SorosilicatesCrystal system : MonoclinicChemistry : (Sc,Y)2Si2O7Rarity : Rare to vey rare
Thorutite
Class : Oxides and hydroxidesSubclass : OxidesCrystal system : MonoclinicChemistry : (Th,U,Ca)Ti2(O,OH)6Rarity : Rare
Thulite
Class : SilicatesSubclass : SorosilicatesCrystal system : OrthorhombicChemistry : Ca2Al3(SiO4)3(OH)Rarity : Rare
Tilasite
Class : Phosphates, arsenates, vanadatesSubclass : Anhydrous arsenatesCrystal system : MonoclinicChemistry : CaMg(AsO4)FRarity : Rare to uncommon
Tincalconite
Class : Carbonates, nitrates, boratesSubclass : BoratesCrystal system : TrigonalChemistry : Na2B4O5(OH)4 3H2ORarity : Uncommon
Tinsleyite
Class : Phosphates, arsenates, vanadatesSubclass : Hydrated phosphatesCrystal system : MonoclinicChemistry : KAl2(PO4)2(OH) 2H2ORarity : Very rare
Tinzenite
Class : SilicatesSubclass : SorosilicatesCrystal system : TriclinicChemistry : (Ca,Mn,Fe)3Al2BSi4O15(OH)Rarity : Very rare
Titanite
Class : SilicatesSubclass : NesosilicatesCrystal system : MonocliniqueChemistry : CaTiSiO5Rarity : Very common
Todorokite
Class : Oxides and hydroxidesSubclass : Hydroxides and hydratesCrystal system : MonoclinicChemistry : (Mn,Ca,Mg)Mn3O7 H2ORarity : Quite common
Topaz
Class : SilicatesSubclass : NesosilicatesCrystal system : OrthorhombicChemistry : Al2SiO4(F,OH)2Rarity : Common
Torbernite
Class : Phosphates, arsenates, vanadatesSubclass : Hydrated phosphatesCrystal system : TetragonalChemistry : Cu(UO2)2(PO4)2 10H2ORarity : Quite common
Tourmaline
Class : SilicatesSubclass : CyclosilicatesCrystal system : TrigonalChemistry : WX3Y6(BO3)Si6O18(O,OH,F)4Rarity : Very common
Trechmannite
Class : Sulfides and sulfosaltsSubclass : SulfosaltsCrystal system : TrigonalChemistry : AgAsS2Rarity : Very rare
Tremolite
Class : SilicatesSubclass : InosilicatesCrystal system : MonoclinicChemistry : Ca2Mg5Si8O22(OH)2Rarity : Common
Tridymite
Class : SilicatesSubclass : TectosilicatesCrystal system : OrthorhombicChemistry : SiO2Rarity : Uncommon to fairly common
Trimounsite
Class : SilicatesSubclass : NesosilicatesCrystal system : MonoclinicChemistry : Y2Ti2SiO9Rarity : Very rare
Triphylite
Class : Phosphates, arsenates, vanadatesSubclass : Anhydrous phosphatesCrystal system : OrthorhombicChemistry : LiFePO4Rarity : Fairly common
Triplite
Class : Phosphates, arsenates, vanadatesSubclass : Anhydrous phosphatesCrystal system : MonoclinicChemistry : (Mn,Fe,Mg,Ca)2(PO4)(F,OH)Rarity : Fairly common
Trögerite
Class : Phosphates, arsenates, vanadatesSubclass : Uranyl arsenatesCrystal system : TetragonalChemistry : (UO2)3(AsO4)2 12H2ORarity : Very rare
Troilite
Class : Sulfides and sulfosaltsSubclass : SulfidesCrystal system : TrigonalChemistry : FeSRarity : Rare
Trona
Class : Carbonates, nitrates, boratesSubclass : Hydrated carbonatesCrystal system : MonoclinicChemistry : Na3CO3(HCO3) 2H2ORarity : Common
Tschermakite
Class : SilicatesSubclass : InosilicatesCrystal system : MonoclinicChemistry : Ca2Mg3Al2(Si6Al2)O22(OH)2Rarity : Rare
Tschermigite
Class : Sulfates, chromates, molybdatesSubclass : Hydrated sulfatesCrystal system : CubicChemistry : (NH4)Al(SO4)2 12H2ORarity : Uncommon
Tsumebite
Class : Phosphates, arsenates, vanadatesSubclass : Anhydrous phosphatesCrystal system : MonoclinicChemistry : Pb2Cu(PO4)(SO4)(OH)Rarity : Rare
Tugtupite
Class : SilicatesSubclass : TectosilicatesCrystal system : TetragonalChemistry : Na4AlBeSi4O12ClRarity : Rare
Tungstenite
Class : Sulfides and sulfosaltsSubclass : SulfidesCrystal system : HexagonalChemistry : WS2Rarity : Very rare
Tungstite
Class : Oxides and hydroxidesSubclass : Hydroxides and hydratesCrystal system : OrthorhombicChemistry : WO3 H2ORarity : Rare
Tunisite
Class : Carbonates, nitrates, boratesSubclass : Anhydrous carbonatesCrystal system : TetragonalChemistry : NaCa2Al4(CO3)4(OH)8ClRarity : Rare
Turquoise
Class : Phosphates, arsenates, vanadatesSubclass : Hydrated phosphatesCrystal system : TriclinicChemistry : CuAl6(PO4)4(OH)84H2ORarity : Uncommon
Tyrolite
Class : Phosphates, arsenates, vanadatesSubclass : Hydrated arsenatesCrystal system : OrthorhombicChemistry : CaCu5(AsO4)2(CO3)(OH)4 6H2ORarity : Uncommon to rare
Tyuyamunite
Class : Phosphates, arsenates, vanadatesSubclass : Uranyl vanadatesCrystal system : OrthorhombicChemistry : Ca(UO2)2(VO4)2 5-8H2ORarity : Uncommon