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Approved minerals
4,194 minerals
| Mineral | Chemical formula | Crystal system | Mohs hardness | Density |
|---|---|---|---|---|
| Taneyamalite | (Na,Ca)(Mn,Mg,Fe)₁₂Si₁₂(O,OH)₄₄ | — | — | — |
| Tangdanite | Ca₂Cu₉(AsO₄)₄(SO₄)₀.₅(OH)₉·9H₂O | Monoclinic | — | — |
| Taniajacoite | SrCaMn³⁺₂Si₄O₁₁(OH)₄·2H₂O | Triclinic | — | — |
| Tanohataite | LiMn₂Si₃O₈(OH) | Triclinic | — | — |
| Tantalaeschynite-(Ce) | Ce(TiTa)O₆ | Orthorhombic | — | — |
| Tantalowodginite | (Mn☐)TaTa₂O₈ | — | — | — |
| Tantite | Ta₂O₅ | Triclinic | — | — |
| Tapiaite | Ca₅Al₂(AsO₄)₄(OH)₄·12H₂O | Monoclinic | — | — |
| Tarbagataite | (K☐)Ca(Fe,Mn)₇Ti₂(Si₄O₁₂)₂O₂(OH)₅ | Triclinic | — | — |
| Tarkianite | (Cu,Fe)(Re,Mo)₄S₈ | Cubic | — | — |
| Tartarosite | C | Cubic | — | — |
| Tarutinoite | Ag₃Pb₇Bi₇S₁₉ | Monoclinic | — | — |
| Taseqite | Na₁₂Sr₃Ca₆Fe₃Zr₃Nb[(Si₃O₉)₂(Si₉O₂₇)₂SiO]Cl₂(O,OH,H₂O)₃ | Trigonal | — | — |
| Tashelgite | CaMgFe²⁺Al₉O₁₆(OH) | Monoclinic | — | — |
| Tassieite | NaCa₂Mg₃Fe²⁺₂F³⁺(PO₄)₆·2H₂O | — | — | — |
| Tatarinovite | Ca₃Al(SO₄)[B(OH)₄](OH)₆·12H₂O | Hexagonal | — | — |
| Tatarskite | Ca₆Mg₂(SO₄)₂(CO₃)₂(OH)₄Cl₄·7H₂O | Orthorhombic | — | — |
| Tatyanaite | (Pt,Pd,Cu)₉Cu₃Sn₄ | Orthorhombic | — | — |
| Tausonite | SrTiO₃ | Cubic | — | — |
| Tavagnascoite | Bi₄O₄(SO₄)(OH)₂ | Orthorhombic | — | — |
| Tazheranite | (Zr,Ti,Ca)(O,☐)₂ | — | — | — |
| Tazieffite | Pb₂₀Cd₂(As,Bi)₂₂S₅₀Cl₁₀ | Monoclinic | — | — |
| Tazzoliite | Ba₂CaSr₀.₅Na₀.₅Ti₂Nb₃SiO₁₇[PO₂(OH)₂]₀.₅ | Orthorhombic | — | — |
| Tedhadleyite | Hg²⁺Hg⁺₁₀O₄I₂(Cl,Br)₂ | Triclinic | — | — |
| Telargpalite | (Pd,Ag)₃(Te,Bi) | Cubic | — | — |
| Tellurantimony | Sb₂Te₃ | Trigonal | — | 6.12 g/cm³ |
| Tellurohauchecornite | Ni₉BiTeS₈ | Tetragonal | — | — |
| Telluromandarinoite | Fe³⁺₂(Te⁴⁺O₃)₃·6H₂O | Monoclinic | — | — |
| Telluronevskite | Bi₃TeSe₂ | Trigonal | — | — |
| Telluropalladinite | Pd₉Te₄ | Monoclinic | — | 10.27 g/cm³ |
| Telluroperite | Pb₃Te⁴⁺O₄Cl₂ | Orthorhombic | — | — |
| Telyushenkoite | (Cs,Na,K)Na₆[Be₂Al₃Si₁₅O₃₉]F₂ | Trigonal | — | — |
| Temagamite | Pd₃HgTe₃ | Orthorhombic | — | — |
| Tengchongite | CaO(UO₂)₆(MoO₄)₂O₅·12H₂O | Orthorhombic | — | — |
| Tennantite-(Hg) | — | Cubic | — | — |
| Tennantite-(In) | Cu₆(Cu₅In)As₄S₁₃ | Cubic | — | — |
| Tennantite-(Ni) | — | Cubic | — | — |
| Tenorite | CuO | Monoclinic | 3.5 | 6.30 g/cm³ |
| Terlinguacreekite | Hg²⁺₃Cl₂O₂ | Orthorhombic | — | — |
| Ternesite | Ca₅(SiO₄)₂(SO₄) | Orthorhombic | — | — |
| Ternovite | MgNb₄O₁₁·8-12H₂O | Monoclinic | — | — |
| Terranovaite | (Na,Ca)₈(Si₆₈Al₁₂)O₁₆₀·~8H₂O | Orthorhombic | — | — |
| Terrywallaceite | AgPb(Sb,Bi)₃S₆ | Monoclinic | — | — |
| Terskite | Na₄ZrSi₆O₁₆·2H₂O | — | — | — |
| Teruggite | Ca₄Mg[AsB₆O₁₁(OH)₆]₂(H₂O)₁₂·2H₂O | Monoclinic | 2.5 | — |
| Testibiopalladite | PdSbTe | Cubic | — | — |
| Tetra-auricupride | CuAu | Tetragonal | — | 14.86 g/cm³ |
| Tetraferroplatinum | PtFe | Tetragonal | — | 14.98 g/cm³ |
| Tetrahedrite-(Cd) | Cu₆(Cu₄Cd₂)Sb₄S₁₂S | Cubic | — | — |
| Tetrahedrite-(Cu) | Cu₆(Cu₄Cu²⁺₂)Sb₄S₁₂S | — | — | — |
| Tetrahedrite-(Hg) | — | Cubic | — | — |
| Tetrahedrite-(Mn) | — | Cubic | — | — |
| Tetrahedrite-(Ni) | — | Cubic | — | — |
| Tetrarooseveltite | Bi(AsO₄) | Tetragonal | — | 7.62 g/cm³ |
| Tetrataenite | FeNi | Monoclinic | — | 8.54 g/cm³ |
| Tetrawickmanite | Mn²⁺Sn⁴⁺(OH)₆ | — | — | — |
| Tewite | K₂(Te₁.₅☐₀.₅)₂W₅O₁₉ | Orthorhombic | — | — |
| Thadeuite | CaMg₃(PO₄)₂(OH,F)₂ | Orthorhombic | — | — |
| Thalcusite | Tl₂Cu₃FeS₄ | Tetragonal | — | — |
| Thalfenisite | Tl₆(Fe,Ni,Cu)₂₅S₂₆Cl | Cubic | — | — |
| Thalhammerite | Pd₉Ag₂Bi₂S₄ | Tetragonal | — | — |
| Thalliomelane | — | Tetragonal | — | — |
| Thalliumpharmacosiderite | TlFe₄[(AsO₄)₃(OH)₄]·4H₂O | Cubic | — | — |
| Thebaite-(NH4) | — | Monoclinic | — | — |
| Theisite | Cu₅Zn₅(AsO₄,SbO₄)₂(OH)₁₄ | — | — | — |
| Theoparacelsite | Cu₃(As₂O₇)(OH)₂ | Orthorhombic | — | — |
| Theophrastite | Ni(OH)₂ | Trigonal | — | — |
| Therasiaite | (NH₄)₃KNa₂Fe²⁺Fe³⁺(SO₄)₃Cl₅ | Monoclinic | — | — |
| Thermaerogenite | CuAl₂O₄ | Cubic | 7.0 | — |
| Thermessaite | K₂AlF₃(SO₄) | Orthorhombic | — | 2.80 g/cm³ |
| Thermessaite-(NH4) | (NH₄)₂AlF₃(SO₄) | Orthorhombic | — | — |
| Theuerdankite | Ag₃AsO₄ | Cubic | 2.0 | — |
| Thionasilite | Na₂Si₂S₂O₃ | Orthorhombic | — | — |
| Thomasclarkite-(Y) | (Na,Ce)(Y,REE)(HCO₃)(OH)₃·4H₂O | Monoclinic | — | — |
| Thometzekite | PbCu²⁺₂(AsO₄)₂·2H₂O | — | — | — |
| Thomsonite-Sr | NaSr₂Al₅Si₅O₂₀·(6-7)H₂O | Orthorhombic | — | — |
| Thorasphite | Th₂H(PO₄,AsO₄)₃·6H₂O | — | — | — |
| Thorbastnäsite | ThCa(CO₃)₂F₂·3H₂O | Hexagonal | — | — |
| Thorikosite | Pb₃Cl₂(OH)(SbO₃,AsO₃) | — | — | — |
| Thornasite | Na₁₂Th₃(Si₈O₁₉)₄·(H₂O)₁₂·6H₂O | — | — | — |