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Approved minerals
4,194 minerals
| Mineral | Chemical formula | Crystal system | Mohs hardness | Density |
|---|---|---|---|---|
| Hydrodresserite | BaAl₂(CO₃)₂(OH)₄ * 3H₂O | Triclinic | — | — |
| Hydroglauberite | Na₁₀Ca₃(SO₄)₈ * 6H₂O | Monoclinic | — | — |
| Hydrohonessite | (Ni₁-xFe³⁺x)(OH)₂(SO₄)x/₂ * nH₂O | Hexagonal | — | — |
| Hydrokenomicrolite | (☐,H₂O)₂Ta₂(O,OH)₆(H₂O) | Cubic | — | 6.67 g/cm³ |
| Hydrokenopyrochlore | (☐,Sb³⁺,Na)₂Nb₂O₆(H₂O) | Cubic | — | 5.08 g/cm³ |
| Hydrombobomkulite | (Ni,Cu)Al₄((NO₃)₂,SO₄)(OH)₁₂ * 13-₁₄H₂O | Monoclinic | — | — |
| Hydroniumpharmacoalumite | (H₃O)Al₄(AsO₄)₃(OH)₄·4.5H₂O | Cubic | 2.5 | — |
| Hydroniumpharmacosiderite | (H₃O)Fe³⁺₄(AsO₄)₃(OH)₄·4H₂O | Cubic | — | — |
| Hydropascoite | Ca₃(V₁₀O₂₈)*₂₄H₂O | Triclinic | — | — |
| Hydroredmondite | — | Monoclinic | — | — |
| Hydroromarchite | Sn²⁺₃O₂(OH)₂ | Tetragonal | — | — |
| Hydrotalcite | Mg₆Al₂(CO₃)(OH)₁₆ * 4H₂O | Trigonal | 2.0 | — |
| Hydroterskite | Na₂ZrSi₆O₁₂(OH)₆ | Orthorhombic | — | — |
| Hydrowoodwardite | (Cu₁-xAlx)(OH)₂[SO₄]x/₂ * nH₂O | — | 2.0 | — |
| Hydroxyapophyllite-(NH₄) | (NH₄)Ca₄(Si₈O₂₀)(OH)(H₂O)₈ | Tetragonal | — | — |
| Hydroxycalciomicrolite | Ca₁.₅Ta₂O₆(OH) | Cubic | — | 6.18 g/cm³ |
| Hydroxycalciopyrochlore | (Ca,Na,U,☐)₂(Nb,Ti)₂O₆(OH) | Cubic | — | — |
| Hydroxycancrinite | (Na,Ca,K)₈(AlSi)₆O₂₄(OH,CO₃)₂·2H₂O | Hexagonal | — | — |
| Hydroxyferroroméite | (Fe²⁺₁.₅☐₀.₅)Sb⁵⁺₂O₆(OH) | Cubic | 3.0 | 5.45 g/cm³ |
| Hydroxykenoelsmoreite | (☐,Pb)₂(W,Fe³⁺,Al)₂(O,OH)₆(OH) | Trigonal | 3.0 | 5.81 g/cm³ |
| Hydroxykenopyrochlore | (☐,Ce,Ba)₂(Nb,Ti)₂O₆(OH,F) | Cubic | — | — |
| Hydroxylbastnäsite-(La) | La(CO₃)(OH) | Hexagonal | — | — |
| Hydroxylbenyacarite | (H₂O)₂Mn₂(Ti₂Fe)(PO₄)₄[O(OH)](H₂O)₁₀·4H₂O | Orthorhombic | — | — |
| Hydroxylborite | Mg₃(BO₃)(OH)₃ | Hexagonal | — | — |
| Hydroxylchondrodite | Mg₅(SiO₄)₂(OH)₂ | Monoclinic | — | — |
| Hydroxylclinohumite | Mg₉(SiO₄)₄(OH)₂ | — | 6.5 | — |
| Hydroxyledgrewite | Ca₉(SiO₄)₄(OH)₂ | Monoclinic | — | — |
| Hydroxylgugiaite | (Ca,☐)₂(Si,Be)(Be,Si)₂O₅(OH)₂ | Tetragonal | — | — |
| Hydroxylhedyphane | Ca₂Pb₃(AsO₄)₃(OH) | — | — | — |
| Hydroxylpyromorphite | Pb₅(PO₄)₃(OH) | Hexagonal | — | — |
| Hydroxylwagnerite | Mg₂(PO₄)(OH) | Monoclinic | — | 2.87 g/cm³ |
| Hydroxymanganopyrochlore | (Mn,Th,Na,Ca,REE)₂(Nb,Ti)₂O₆(OH) | Cubic | — | 5.40 g/cm³ |
| Hydroxymcglassonite-(K) | KSr₄Si₈O₂₀(OH)(H₂O)₈ | Tetragonal | — | — |
| Hydroxynatropyrochlore | (Na,Ca,Ce)₂Nb₂O₆(OH) | Cubic | 5.0 | — |
| Hydroxyplumbopyrochlore | (Pb₁.₅☐₀.₅)Nb₂O₆(OH) | Cubic | — | — |
| Hylbrownite | Na₃MgP₃O₁₀·12H₂O | Monoclinic | — | — |
| Hypercinnabar | HgS | Hexagonal | 3.0 | 7.38 g/cm³ |
| Hyršlite | — | Monoclinic | — | — |
| Håleniusite-(Ce) | CeOF | Cubic | — | — |
| Håleniusite-(La) | LaOF | Cubic | — | 6.07 g/cm³ |
| Ianbruceite | Zn₂O[AsO₃(OH)](H₂O)₃.₅₃ | Monoclinic | — | — |
| Iangreyite | Ca₂Al₇(PO₄)₂(PO₃OH)₂(OH,F)₁₅·8H₂O | Trigonal | — | — |
| Ichnusaite | Th(MoO₄)₂·3H₂O | Monoclinic | — | — |
| Icosahedrite | Al₆₃Cu₂₄Fe₁₃ | Quasicrystal | — | — |
| Igelströmite | Fe³⁺(SbPb)O₄ | Tetragonal | — | — |
| Ikaite | CaCO₃·6H₂O | Monoclinic | — | — |
| Ikorskyite | KMn³⁺(Si₄O₁₀)·3H₂O | Monoclinic | — | — |
| Ikranite | (Na,H₃O)₁₅(Ca,Mn²⁺)₆Fe³⁺₂Zr₃[(H₀-₃Si₃O₉)₂(Si₉O₂₇)₂SiO]Cl·nH₂O | Trigonal | 5.0 | — |
| Ikunolite | Bi₄S₃ | Trigonal | — | — |
| Ilinskite | (Na,K)Cu₅(SeO₃)₂O₂Cl₃ | Orthorhombic | 1.5 | — |
| Ilirneyite | Mg₀.₅ZnMn³⁺(Te₄+O₃)₃·4.5H₂O | Hexagonal | — | — |
| Iltisite | HgAgSCl | Hexagonal | — | — |
| Ilyukhinite | (H₃O,Na)₁₄Ca₆Mn₂Zr₃Si₂₆O₇₂(OH)₂·3H₂O | Trigonal | — | — |
| Imandrite | Na₁₂Ca₃Fe³⁺₂(Si₆O₁₈)₂ | Orthorhombic | — | — |
| Imayoshiite | Ca₃Al(CO₃)[B(OH)₄](OH)₆·12H₂O | Hexagonal | — | — |
| Imhofite | Tl₅.₈As₁₅.₄S₂₆ | — | — | — |
| Inaglyite | Cu₃Pb(Ir,Pt)₈S₁₆ | — | — | — |
| Incomsartorite | Tl₆Pb₁₄₄As₂₄₆S₅₁₆ | Monoclinic | — | — |
| Inderite | MgB₃O₃(OH)₅·5H₂O | Monoclinic | — | — |
| Indigirite | Mg₂Al₂(CO₃)₄(OH)₂·15H₂O | — | — | — |
| Indite | FeIn₂S₄ | Cubic | — | — |
| Indium (native) | In | Tetragonal | — | — |
| Ingersonite | Ca₃Mn²⁺Sb₅+₄O₁₄ | Trigonal | — | — |
| Ingodite | Bi₂TeS | — | — | — |
| Innsbruckite | Mn₃₃(Si₂O₅)₁₄(OH)₃₈ | Monoclinic | — | — |
| Insizwaite | Pt(Bi,Sb)₂ | Cubic | — | — |
| Interliveingite | AgPb₁₈As₂₅S₅₆ | Monoclinic | — | — |
| Intersilite | Na₆Mn²⁺Ti[Si₁₀O₂₄(OH)](OH)₃·4H₂O | — | — | — |
| Iodargyrite | AgI | Hexagonal | — | 5.81 g/cm³ |
| Iowaite | Mg₆Fe³⁺₂(OH)₁₆Cl₂·4H₂O | Hexagonal | 1.5 | 2.10 g/cm³ |
| Iquiqueite | K₃Na₄Mg(CrO₄)B₂₄O₃₉(OH)·12H₂O | Hexagonal | — | — |
| Iranite | — | Triclinic | — | — |
| Iraqite-(La) | KCa₂(La,Ce,Th)Si₈O₂₀ | Tetragonal | — | — |
| Irarsite | IrAsS | Cubic | — | — |
| Irhtemite | Ca₄Mg(AsO₄)₂(HAsO₄)₂·4H₂O | Monoclinic | — | — |
| Iridarsenite | (Ir,Ru)As₂ | Monoclinic | — | 10.90 g/cm³ |
| Irinarassite | Ca₃Sn₂(SiAl₂)O₁₂ | Cubic | — | — |
| Irtyshite | Na₂(Ta,Nb)₄O₁₁ | Hexagonal | — | — |
| Iseite | Mn₂Mo₃O₈ | Hexagonal | — | — |
| Ishiharaite | (Cu,Ga,Fe,In,Zn)S | Cubic | — | — |