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Approved minerals
4,194 minerals
| Mineral | Chemical formula | Crystal system | Mohs hardness | Density |
|---|---|---|---|---|
| Wilhelmgümbelite | — | Orthorhombic | — | — |
| Wilhelmkleinite | ZnFe³⁺₂(AsO₄)₂(OH)₂ | Monoclinic | 4.5 | 4.36 g/cm³ |
| Wilhelmramsayite | Cu₃FeS₃*₂H₂O | Orthorhombic | — | — |
| Wilhelmvierlingite | CaMnFe³⁺(PO₄)₂(OH) * 2H₂O | Orthorhombic | — | — |
| Wilkinsonite | Na₂Fe²⁺₄Fe³⁺₂(Si₆O₁₈)O₂ | Triclinic | — | — |
| Wilkmanite | Ni₃Se₄ | Monoclinic | — | — |
| Willemseite | Ni₃Si₄O₁₀(OH)₂ | Monoclinic | 2.0 | 3.31 g/cm³ |
| Willhendersonite | KCa[Al₃Si₃O₁₂] * 5H₂O | Triclinic | — | — |
| Wiluite | Ca₁₉(Al,Mg)₁₃(B,☐,Al)₅(Si₂O₇)₄(SiO₄)₁₀(O,OH)₁₀ | Tetragonal | 6.0 | 3.36 g/cm³ |
| Windhoekite | Ca₂Fe³⁺₃₋ₓ[Si₈O₂₀](OH)₄·10H₂O | Monoclinic | — | — |
| Windmountainite | ☐Fe³⁺₂Mg₂☐₂Si₈O₂0(OH)₂∙8H₂O | Monoclinic | — | — |
| Winstanleyite | TiTe₄+₃O₈ | Cubic | — | — |
| Wiperamingaite | NaCaFe³⁺Al(PO₄)F₅(OH)·H₂O | Orthorhombic | — | — |
| Witzkeite | Na₄K₄Ca(NO₃)₂(SO₄)₄·2H₂O | Monoclinic | 2.0 | — |
| Wodginite | Mn²⁺Sn⁴⁺Ta₂O₈ | Monoclinic | — | — |
| Wolfsriedite | Pb[(UO₂)₂(W⁶⁺Fe³⁺)O₇(OH)](H₂O)₃ | Monoclinic | — | — |
| Wollastonite | CaSiO₃ | Triclinic | — | 2.90 g/cm³ |
| Wonesite | (Na,K)(Mg,Fe,Al)₆((Al,Si)₄O₁₀)₂(OH,F)₄ | Triclinic | — | — |
| Woodallite | Mg₆Cr₂(OH)₁₆Cl₂·4H₂O | Trigonal | — | — |
| Wooldridgeite | Na₂CaCu²⁺₂(P₂O₇)₂ * 10H₂O | Orthorhombic | — | — |
| Wopmayite | Ca₆Na₃☐Mn(PO₄)₃(PO₃OH)₄ | Trigonal | — | — |
| Wortupaite | MgNi(Te⁴⁺O₃)₃·3H₂O | Hexagonal | — | — |
| Wrightite | K₂Al₂O(AsO₄)₂ | Orthorhombic | — | — |
| Wroewolfeite | Cu₄(SO₄)(OH)₆ * 2H₂O | Monoclinic | — | — |
| Wulffite | K₃NaCu₄O₂(SO₄)₄ | Orthorhombic | — | — |
| Wumuite | KAl₀.₃₃W₂.₆₇O₉ | Hexagonal | — | — |
| Wupatkiite | (Co,Mg,Ni)Al₂(SO₄)₄*₂₂H₂O | Monoclinic | — | — |
| Wusiheite | BaGe(Ge₃O₉) | Trigonal | — | — |
| Wuyanzhiite | Cu₂S | Tetragonal | — | — |
| Wyartite | CaU₅+(UO₂)₂(CO₃)O₄(OH) * 7H₂O | Orthorhombic | — | — |
| Wycheproofite | NaAlZr(PO₄)₂(OH)₂·H₂O | Triclinic | — | — |
| Wyllieite | (Na,Ca,Mn)(Mn,Fe)(Fe,Mg)Al(PO₄)₃ | Monoclinic | — | — |
| Wülfingite | — | Orthorhombic | — | — |
| Xenophyllite | Na₄Fe₇(PO₄)₆ | Triclinic | — | — |
| Xenotime-(Gd) | Gd(PO₄) | Tetragonal | — | — |
| Xenotime-(Yb) | Yb(PO₄) | Tetragonal | — | 6.56 g/cm³ |
| Xiangjiangite | Fe³⁺(UO₂)₄(PO₄)₂(SO₄)₂(OH)·22H₂O | Tetragonal | — | — |
| Xianhuaite-(Ce) | K₂CeNb₅O₁₅ | Tetragonal | — | — |
| Xianhuaite-(La) | K₂LaNb₅O₁₅ | Tetragonal | — | — |
| Xieite | Fe²⁺Cr₂O₄ | Orthorhombic | — | — |
| Xiexiandeite | SiO₂ | Monoclinic | — | 2.63 g/cm³ |
| Xifengite | Fe₅Si₃ | Hexagonal | — | — |
| Xilingolite | Pb₃Bi₂S₆ | Monoclinic | — | 6.96 g/cm³ |
| Ximengite | Bi(PO₄) | Trigonal | — | 6.87 g/cm³ |
| Xitieshanite | Fe³⁺(SO₄)Cl·6H₂O | Monoclinic | — | — |
| Xocolatlite | Ca₂Mn⁴⁺₂Te⁶⁺₂O₁₂·H₂O | Monoclinic | — | — |
| Xocomecatlite | Cu₃(Te⁶⁺O₄)(OH)₄ | Orthorhombic | 4.0 | — |
| Xuite | Ca₃Fe₂[AlO₃(OH)]₃ | Cubic | — | — |
| Xuwenyuanite | Ag₉Fe³⁺Te₂S₄ | Cubic | — | — |
| Yafsoanite | Ca₃Te⁶⁺₂(ZnO₄)₃ | Cubic | 5.5 | — |
| Yagiite | NaMg₂(AlMg₂Si₁₂)O₃₀ | Hexagonal | — | — |
| Yakhontovite | (Ca,Na,K)₀.₂(Cu,Fe,Mg)₂(Si₄O₁₀)(OH)₂·3H₂O | Monoclinic | — | — |
| Yakovenchukite-(Y) | K₃NaCaY₂Si₁₂O₃₀·4H₂O | Orthorhombic | — | — |
| Yakubovichite | CaNi₂Fe³⁺(PO₄)₃ | Orthorhombic | — | — |
| Yamhamelachite | KCrP₂O₇ | Monoclinic | — | 2.94 g/cm³ |
| Yancowinnaite | PbCuAl(AsO₄)₂OH·H₂O | Triclinic | 3.0 | — |
| Yangite | PbMnSi₃O₈·H₂O | Triclinic | — | — |
| Yangzhumingite | KMg₂.₅Si₄O₁₀F₂ | Monoclinic | — | — |
| Yanomamite | In(AsO₄)·2H₂O | Orthorhombic | — | — |
| Yarlongite | (Cr₄Fe₄Ni)C₄ | Hexagonal | — | — |
| Yaroshevskite | Cu₉O₂(VO₄)₄Cl₂ | Triclinic | — | — |
| Yaroslavite | Ca₃Al₂F₁₀(OH)₂·H₂O | Orthorhombic | — | — |
| Yarrowite | Cu₉S₈ | Trigonal | — | 4.89 g/cm³ |
| Yarzhemskiite | K[B₅O₇(OH)₂]·H₂O | Monoclinic | — | — |
| Yavapaiite | KFe³⁺(SO₄)₂ | Monoclinic | — | — |
| Yazganite | ☐NaMgFe³⁺₂(AsO₄)₃·H₂O | Monoclinic | 5.0 | — |
| Ye'elimite | Ca₄Al₆O₁₂(SO₄) | Cubic | — | 2.52 g/cm³ |
| Yecoraite | Fe³⁺₃Bi₅O₉(Te⁴⁺O₃)(Te⁶⁺O₄)₂·9H₂O | Tetragonal | — | — |
| Yedlinite | Pb₆Cr(Cl,OH)₆(O,OH)₈ | Trigonal | — | — |
| Yegorovite | Na₄[Si₂O₄(OH)₂]₂·7H₂O | Monoclinic | — | — |
| Yeite | TiSi | Orthorhombic | — | 4.27 g/cm³ |
| Yellowcatite | KNaFe³⁺₂(Se⁴⁺O₃)₂(V⁵⁺₂O₇)·7H₂O | Hexagonal | — | — |
| Yeomanite | Pb₂O(OH)Cl | Orthorhombic | — | — |
| Yingjiangite | K₂Ca(UO₂)₇(PO₄)₄(OH)₆·6H₂O | Orthorhombic | — | — |
| Yixunite | Pt₃In | Cubic | — | 17.91 g/cm³ |
| Yoderite | (MgAl₃)(MgAl)Al₂O₂(SiO₄)₄(OH)₂ | Monoclinic | 6.0 | — |
| Yofortierite | Mn²⁺₅Si₈O₂₀(OH)₂·7H₂O | Monoclinic | 2.5 | — |
| Yoshiokaite | Ca₁₋ₓ(Al,Si)₂O₄ | Trigonal | — | — |
| Yttriaite-(Y) | Y₂O₃ | Cubic | — | — |
| Yttrotungstite-(Nd) | NdW₂O₇(OH)(H₂O) | Monoclinic | — | — |