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Grandfathered minerals
1,125 minerals
| Mineral | Chemical formula | Crystal system | Mohs hardness | Density |
|---|---|---|---|---|
| Truscottite | (Ca,Mn)₁₄Si₂₄O₅₈(OH)₈·2H₂O | — | — | — |
| Trögerite | (H₃O)(UO₂)(AsO₄)·3H₂O | Tetragonal | — | — |
| Tschermigite | NH₄Al(SO₄)₂·12H₂O | Cubic | 1.5 | — |
| Tsumebite | Pb₂Cu(PO₄)(SO₄)(OH) | — | 3.5 | — |
| Tuhualite | NaFe²⁺Fe³⁺Si₆O₁₅ | — | — | — |
| Tungstenite | WS₂ | Hexagonal | — | 7.23 g/cm³ |
| Tungstite | WO₃·H₂O | — | — | — |
| Turanite | Cu₅(VO₄)₂(OH)₄ | Triclinic | — | — |
| Tychite | Na₆Mg₂(CO₃)₄(SO₄) | Cubic | — | 2.63 g/cm³ |
| Tyrolite | Ca₂Cu₉(AsO₄)₄(CO₃)(OH)₈·11H₂O | Monoclinic | 2.0 | — |
| Tyrrellite | Cu(Co,Ni)₂Se₄ | Cubic | — | — |
| Tyuyamunite | Ca(UO₂)₂(VO₄)₂·5-8H₂O | Orthorhombic | — | — |
| Ulexite | NaCaB₅O₆(OH)₆·5H₂O | Triclinic | 2.5 | — |
| Ullmannite | NiSbS | Cubic | — | — |
| Ulvöspinel | Fe²⁺₂TiO₄ | Cubic | — | — |
| Umangite | Cu₃Se₂ | Tetragonal | 3.0 | 6.70 g/cm³ |
| Umohoite | (UO₂)(MoO₄)(H₂O)·H₂O | Triclinic | 2.0 | — |
| Ungemachite | K₃Na₈Fe³⁺(SO₄)₆(NO₃)₂·6H₂O | Trigonal | 2.5 | — |
| Uralolite | Ca₂Be₄(PO₄)₃(OH)₃·5H₂O | Monoclinic | — | — |
| Uramphite | NH₄(UO₂)PO₄·3H₂O | Tetragonal | — | — |
| Uraninite | UO₂ | Cubic | — | 11.06 g/cm³ |
| Uranopilite | (UO₂)₆SO₄O₂(OH)₆·14H₂O | Triclinic | 2.0 | — |
| Uranospathite | (Al,☐)(UO₂)₂F(PO₄)₂·20H₂O | Orthorhombic | — | — |
| Uranosphaerite | Bi(UO₂)O₂(OH) | Monoclinic | — | — |
| Uranospinite | Ca(UO₂)₂(AsO₄)₂·10H₂O | Tetragonal | — | — |
| Ussingite | Na₂AlSi₃O₈(OH) | Triclinic | — | 2.42 g/cm³ |
| Vaesite | NiS₂ | Cubic | — | — |
| Valleriite | 2[(Fe,Cu)S]·1.53[(Mg,Al)(OH)₂] | Trigonal | — | — |
| Vanadinite | Pb₅(VO₄)₃Cl | Hexagonal | 3.0 | 6.88 g/cm³ |
| Vandenbrandeite | Cu(UO₂)(OH)₄ | Triclinic | 4.0 | — |
| Vandendriesscheite | Pb₁.₆(UO₂)₁₀O₆(OH)₁₁·11H₂O | Orthorhombic | 3.0 | 5.45 g/cm³ |
| Vanoxite | V₆O₁₃·8H₂O (?) | — | — | — |
| Vanthoffite | Na₆Mg(SO₄)₄ | Monoclinic | — | 2.77 g/cm³ |
| Vashegyite | Al₁₁(PO₄)₉(OH)₆·38H₂O | Orthorhombic | — | — |
| Vauquelinite | CuPb₂(CrO₄)(PO₄)(OH) | Monoclinic | — | — |
| Vauxite | Fe²⁺Al₂(PO₄)₂(OH)₂·6H₂O | Triclinic | 3.5 | — |
| Vermiculite | Mg₀.₇(Mg,Fe,Al)₆(Si,Al)₈O₂₀(OH)₄ * 8H₂O | Monoclinic | 1.3 | 2.55 g/cm³ |
| Veszelyite | Cu²⁺₃PO₄(OH)₃·2H₂O | — | — | — |
| Villiaumite | NaF | Cubic | — | 2.92 g/cm³ |
| Vinogradovite | Na₄Ti₄(Si₂O₆)₂[(Si,Al)₄O₁₀]O₄ * (H₂O,Na,K)₃ | Monoclinic | — | — |
| Violarite | Fe²⁺Ni³⁺₂S₄ | Cubic | — | — |
| Vishnevite | Na₈(Al₆Si₆)O₂₄(SO₄)·2H₂O | Hexagonal | — | — |
| Vivianite | Fe²⁺₃(PO₄)₂·8H₂O | Monoclinic | — | — |
| Voglite | Ca₂Cu(UO₂)(CO₃)₄·6H₂O | Monoclinic | — | — |
| Voltaite | K₂Fe²⁺₅Fe³⁺₃Al(SO₄)₁₂ * 18H₂O | Cubic | 3.0 | — |
| Vonsenite | Fe²⁺₂Fe³⁺O₂(BO₃) | Orthorhombic | 5.0 | — |
| Vrbaite | Hg₃Tl₄As₈Sb₂S₂₀ | Orthorhombic | — | — |
| Väyrynenite | Mn²⁺Be(PO₄)OH | Monoclinic | 5.0 | — |
| Vésigniéite | — | Monoclinic | — | — |
| Wadeite | K₂Zr(Si₃O₉) | Hexagonal | — | 2.98 g/cm³ |
| Walpurgite | (BiO)₄(UO₂)(AsO₄)₂·2H₂O | Triclinic | 3.5 | — |
| Wardite | NaAl₃(PO₄)₂(OH)₄·2H₂O | Tetragonal | 5.0 | — |
| Warwickite | (Mg,Ti,Fe,Cr,Al)₂O(BO₃) | Orthorhombic | — | — |
| Weberite | Na₂MgAlF₇ | Orthorhombic | 3.5 | 2.84 g/cm³ |
| Weddellite | Ca(C₂O₄)·2H₂O | Tetragonal | 4.0 | — |
| Weissite | Cu₂₋ₓTe | Hexagonal | — | — |
| Wherryite | Pb₇Cu₂(SO₄)₄(SiO₄)₂(OH)₂ | Monoclinic | — | — |
| Whitlockite | Ca₉Mg(PO₄)₆(PO₃OH) | Trigonal | 5.0 | — |
| Willemite | Zn₂SiO₄ | Trigonal | 5.5 | 4.25 g/cm³ |
| Wiserite | Mn²⁺₁₄(B₂O₅)₄(OH)₈·(Si,Mg)(O,OH)₄Cl | Tetragonal | 2.5 | — |
| Witherite | BaCO₃ | Orthorhombic | — | 4.24 g/cm³ |
| Wittichenite | Cu₃BiS₃ | Orthorhombic | — | — |
| Wolfeite | (Fe²⁺,Mn²⁺)₂(PO₄)(OH) | Monoclinic | — | — |
| Woodruffite | Zn²⁺x/₂(Mn₄+₁-xMn³⁺x)O₂*yH₂O | Monoclinic | — | — |
| Woodwardite | (Cu₁-ₓAlₓ)(SO₄)ₓ/₂(OH)₂ · nH₂O (x < 0.5, n < 3x/2) | Hexagonal | 2.0 | — |
| Wulfenite | PbMoO₄ | Tetragonal | 3.0 | 6.75 g/cm³ |
| Wurtzite | ZnS | Hexagonal | — | 4.14 g/cm³ |
| Wöhlerite | — | Monoclinic | — | — |
| Wölsendorfite | Pb₇(UO₂)₁₄O₁₉(OH)₄·12H₂O | Orthorhombic | 5.0 | — |
| Wüstite | FeO | Cubic | 5.0 | — |
| Xanthoconite | Ag₃AsS₃ | Monoclinic | — | 5.39 g/cm³ |
| Xonotlite | Ca₆Si₆O₁₇(OH)₂ | Monoclinic | — | — |
| Yeatmanite | Zn₆Mn²⁺₉Sb⁵⁺₂O₁₂(SiO₄)₄ | Triclinic | — | — |
| Yukonite | Ca₂Fe³⁺₃(AsO₄)₃(OH)₄·4H₂O | Orthorhombic | — | — |
| Yuksporite | K₄(Ca,Na)₁₄(Sr,Ba)₂(☐,Mn,Fe)(Ti,Nb)₄(O,OH)₄(Si₆O₁₇)₂(Si₂O₇)₃(H₂O,OH)₃ | Monoclinic | 5.0 | — |
| Zeophyllite | Ca₁₃Si₁₀O₂₈(OH)₂F₈ * 6H₂O | Trigonal | 3.0 | — |
| Zeunerite | Cu(UO₂)₂(AsO₄)₂·12H₂O | Tetragonal | 2.5 | — |
| Zincite | ZnO | Hexagonal | 4.0 | 5.70 g/cm³ |
| Zincocopiapite | ZnFe³⁺₄(SO₄)₆(OH)₂ * 18H₂O | Triclinic | — | — |
| Zinkenite | Pb₉Sb₂₂S₄₂ | Hexagonal | — | — |