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Approved minerals
4,194 minerals
| Mineral | Chemical formula | Crystal system | Mohs hardness | Density |
|---|---|---|---|---|
| Tsumcorite | PbZn₂(AsO₄)₂·2H₂O | Monoclinic | 4.5 | — |
| Tsumgallite | GaO(OH) | Orthorhombic | — | 5.20 g/cm³ |
| Tsumoite | BiTe | Trigonal | — | — |
| Tsygankoite | Mn₈Tl₈Hg₂(Sb₂₁Pb₂Tl)S₄₈ | — | — | — |
| Tubulite | Ag₂Pb₂₂Sb₂₀S₅₃ | Monoclinic | — | — |
| Tugarinovite | MoO₂ | — | — | — |
| Tugtupite | Na₄BeAlSi₄O₁₂Cl | Tetragonal | 4.0 | 2.46 g/cm³ |
| Tuite | Ca₃(PO₄)₂ | Trigonal | — | 2.78 g/cm³ |
| Tulameenite | CuFePt₂ | Tetragonal | — | — |
| Tuliokite | Na₆BaTh(CO₃)₆·6H₂O | Trigonal | — | — |
| Tululite | Ca₁₄(Fe³⁺,Al)(Al,Zn,Fe³⁺,Si,P,Mn,Mg)₁₅O₃₆ | Cubic | — | — |
| Tumchaite | Na₂Zr(Si₄O₁₁)·2H₂O | Monoclinic | — | — |
| Tunellite | SrB₆O₉(OH)₂·3H₂O | Monoclinic | — | — |
| Tungsten (native) | W | Cubic | — | 19.27 g/cm³ |
| Tungstibite | Sb₂WO₆ | Orthorhombic | — | — |
| Tungusite | Ca₄Fe₂Si₆O₁₅(OH)₆ | — | — | — |
| Tunisite | NaCa₂Al₄(CO₃)₄(OH)₈Cl | Tetragonal | — | — |
| Tuperssuatsiaite | Na₂Fe₃Si₈O₂₀(OH)₂·4H₂O | Monoclinic | — | — |
| Turkestanite | (K,☐)(Ca,Na)₂ThSi₈O₂₀·nH₂O | Tetragonal | — | — |
| Turneaureite | Ca₅(AsO₄)₃Cl | Hexagonal | — | — |
| Turquoise | CuAl₆(PO₄)₄(OH)₈·4H₂O | Triclinic | — | — |
| Turtmannite | (Mn,Mg)₂₂.₅Mg₃-₃x((V₅+,As₅+)O₄)₃(As³⁺O₃)x(SiO₄)₃O₅-₅x(OH)₂₀+x | — | — | — |
| Tuscanite | (K(Ca,Na)₆(Si,Al)₁₀O₂₂[SO₄,CO₃,(OH)₂])·H₂O | — | — | — |
| Tusionite | Mn²⁺Sn₄+[BO₃]₂ | Trigonal | — | — |
| Tuzlaite | NaCaB₅O₈(OH)₂·3H₂O | Monoclinic | — | — |
| Tvalchrelidzeite | Hg₃SbAsS₃ | Monoclinic | — | — |
| Tvedalite | (Ca,Mn)₄Be₃Si₆O₁₇(OH)₄·3H₂O | — | — | — |
| Tvrdýite | Fe²⁺Fe³⁺₂Al₃(PO₄)₄(OH)₅(H₂O)₄·2H₂O | Monoclinic | — | — |
| Twinnite | Pb₀.₈Tl₀.₁Sb₁.₃As₀.₈S₄ | — | 3.5 | — |
| Tyretskite | Ca₂B₅O₉OH·H₂O | — | — | — |
| Tzeferisite | CaZn₈(SO₄)₂(OH)₁₂Cl₂(H₂O)₉ | Trigonal | — | — |
| Törnroosite | Pd₁₁As₂Te₂ | Cubic | — | — |
| Uakitite | VN | Cubic | — | — |
| Udinaite | NaMg₄(VO₄)₃ | Tetragonal | — | 3.26 g/cm³ |
| Uedaite-(Ce) | Mn²⁺CeAl₂Fe²⁺(Si₂O₇)(SiO₄)O(OH) | Monoclinic | — | — |
| Ulfanderssonite-(Ce) | (Ce₁₅Ca)∑₁₆Mg₂(SiO₄)₁₀(SiO₃OH)(OH,F)₅Cl₃ | Monoclinic | — | — |
| Ulrichite | CaCu(UO₂)(PO₄)₂·4H₂O | Monoclinic | — | — |
| Umbite | K₂ZrSi₃O₉·H₂O | Orthorhombic | 4.5 | — |
| Umbozerite | Na₃Sr₄ThSi₈(O,OH)₂₄ | Amorphous | — | — |
| Umbrianite | K₇Na₂Ca₂[Al₃Si₁₀O₂₉]F₂Cl₂ | Orthorhombic | — | — |
| Ungavaite | Pd₄Sb₃ | Tetragonal | — | — |
| Upalite | Al(UO₂)₃(PO₄)₂O(OH)·7H₂O | Monoclinic | — | — |
| Uralborite | CaB₂O₂(OH)₄ | Monoclinic | — | — |
| Uramarsite | (NH₄)(UO₂)(AsO₄)·3H₂O | Tetragonal | — | — |
| Urancalcarite | Ca(UO₂)₃(CO₃)(OH)₆·3H₂O | Orthorhombic | — | — |
| Uranoclite | (UO₂)₂(OH)₂Cl₂(H₂O)₄ | Monoclinic | — | — |
| Uranopolycrase | (U,Y)(Ti,Nb,Ta)₂(O,OH)₆ | Orthorhombic | — | — |
| Uranosilite | (UO₂)Si₇O₁₅ | Orthorhombic | — | — |
| Uranotungstite | Fe(UO₂)₂(WO₄)(OH)₄·12H₂O | Orthorhombic | — | — |
| Urea | CO(NH₂)₂ | Tetragonal | — | — |
| Uricite | C₅H₄N₄O₃ | Monoclinic | — | — |
| Uroxite | [(UO₂)₂(C₂O₄)(OH)₂(H₂O)₂]·H₂O | Monoclinic | — | — |
| Urusovite | CuAlO(AsO₄) | Monoclinic | — | — |
| Urvantsevite | Pd(Bi,Pb)₂ | Tetragonal | 2.0 | 9.66 g/cm³ |
| Ushkovite | MgFe³⁺₂(PO₄)₂(OH)₂·8H₂O | Triclinic | — | — |
| Usovite | Ba₂CaMgAl₂F₁₄ | Monoclinic | — | 4.05 g/cm³ |
| Uvarovite | Ca₃Cr₂(SiO₄)₃ | Cubic | — | 3.83 g/cm³ |
| Uvite | — | Trigonal | 7.5 | — |
| Uytenbogaardtite | Ag₃AuS₂ | Trigonal | 2.0 | — |
| Uzonite | As₄S₅ | Monoclinic | — | — |
| Vadlazarenkovite | Pd₈Bi₁.₅Te₁.₂₅As₀.₂₅ | Trigonal | — | — |
| Vajdakite | (Mo⁶⁺O₂)₂As³⁺₂O₅·3H₂O | Monoclinic | — | — |
| Vakhrushevaite | Mg₅Cr(AlSi₃O₁₀)(OH)₈ | Triclinic | — | — |
| Valentinite | Sb₂O₃ | Orthorhombic | — | — |
| Valleyite | Ca₄Fe₆O₁₃ | Cubic | — | — |
| Vallouiseite | Ag₃Tl₂₁.₅PbSb₆₃As₄₁.₅S₁₇₀ | Triclinic | — | — |
| Vanackerite | Pb₄Cd(AsO₄)₃Cl | Trigonal | — | 7.28 g/cm³ |
| Vanadio-oxy-chromium-dravite | NaV₃(Cr₄Mg₂)(Si₆O₁₈)(BO₃)₃(OH)₃O | Trigonal | 7.5 | — |
| Vanadio-oxy-dravite | NaV₃(Al₄Mg₂)(Si₆O₁₈)(BO₃)₃(OH)₃O | Trigonal | 7.5 | — |
| Vanadio-pargasite | NaCa₂(Mg³⁺₄V)(Si₆Al₂)O₂₂(OH)₂ | Monoclinic | — | — |
| Vanadiocarpholite | Mn²⁺V³⁺AlSi₂O₆(OH)₄ | Orthorhombic | — | — |
| Vanadium (native) | V | Cubic | — | — |
| Vanadoakasakaite-(Ce) | CaCe(V³⁺AlMn²⁺)O[Si₂O₇][SiO₄](OH) | Monoclinic | — | — |
| Vanadoakasakaite-(La) | (CaLa)(V³⁺AlMn²⁺)O[Si₂O₇][SiO₄](OH) | Monoclinic | — | — |
| Vanadoallanite-(La) | CaLa³⁺V³⁺AlFe²⁺(Si₂O₇)(SiO₄)O(OH) | Monoclinic | — | — |
| Vanadoandrosite-(Ce) | MnCe(V³⁺AlMn²⁺)[Si₂O₇][SiO₄]O(OH) | Monoclinic | — | — |
| Vanadoandrosite-(La) | Mn²⁺La(V³⁺AlMn²⁺)(Si₂O₇)(SiO₄)O(OH) | Monoclinic | — | — |
| Vanadomalayaite | CaVO(SiO₄) | Monoclinic | — | — |
| Vanalite | NaAl₈V₁₀O₃₈·30H₂O | Monoclinic | — | — |
| Vanarsite | NaCa₁₂(H₂O)₆₄(As³⁺V⁵⁺₈.₅V⁴⁺₃.₅As⁵⁺₆O₅₁)₂·14H₂O | Monoclinic | 2.0 | — |