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Monoclinic crystal system
1,774 minerals
| Mineral | Chemical formula | Mohs hardness | Density |
|---|---|---|---|
| Huanzalaite | Mg(WO₄) | — | 6.87 g/cm³ |
| Hugotibergite | Ca₆CaPb₂(Si₃O₉)₂(SO₄)₂(OH)₂(H₂O)₄ | — | — |
| Hulsite | Fe²⁺₂Fe³⁺O₂(BO₃) | 3.0 | — |
| Humboldtine | Fe²⁺(C₂O₄)⋅2H₂O | — | — |
| Hurlbutite | CaBe₂P₂O₈ | — | 2.80 g/cm³ |
| Huttonite | ThSiO₄ | 4.5 | 6.66 g/cm³ |
| Hydrobasaluminite | Al₄(SO₄)(OH)₁₀ * 12-₃₆H₂O | — | — |
| Hydroboracite | CaMg[B₃O₄(OH)₃]₂·3H₂O | — | — |
| Hydrochlorborite | Ca₄B₈O₁₅Cl₂ * 2₁H₂O | — | — |
| Hydroglauberite | Na₁₀Ca₃(SO₄)₈ * 6H₂O | — | — |
| Hydrohalite | NaCl·2H₂O | — | — |
| Hydromagnesite | Mg₅(CO₃)₄(OH)₂·4H₂O | 3.5 | — |
| Hydrombobomkulite | (Ni,Cu)Al₄((NO₃)₂,SO₄)(OH)₁₂ * 13-₁₄H₂O | — | — |
| Hydroredmondite | — | — | — |
| Hydroxylchondrodite | Mg₅(SiO₄)₂(OH)₂ | — | — |
| Hydroxyledgrewite | Ca₉(SiO₄)₄(OH)₂ | — | — |
| Hydroxylherderite | CaBePO₄(OH) | — | — |
| Hydroxylwagnerite | Mg₂(PO₄)(OH) | — | 2.87 g/cm³ |
| Hydrozincite | Zn₅(CO₃)₂(OH)₆ | — | — |
| Hylbrownite | Na₃MgP₃O₁₀·12H₂O | — | — |
| Hyršlite | — | — | — |
| Häggite | V₂O₂(OH)₃ | 4.5 | — |
| Hübnerite | Mn²⁺WO₄ | — | — |
| Ianbruceite | Zn₂O[AsO₃(OH)](H₂O)₃.₅₃ | — | — |
| Ichnusaite | Th(MoO₄)₂·3H₂O | — | — |
| Ikaite | CaCO₃·6H₂O | — | — |
| Ikorskyite | KMn³⁺(Si₄O₁₀)·3H₂O | — | — |
| Ilesite | (Mn,Zn,Fe)SO₄·4H₂O | — | — |
| Ilmajokite-(Ce) | (Na,Ce,Ba)₂TiSi₃O₅(OH)₁₀·29H₂O | — | — |
| Imiterite | Ag₂HgS₂ | 2.5 | — |
| Incomsartorite | Tl₆Pb₁₄₄As₂₄₆S₅₁₆ | — | — |
| Inderborite | CaMg[B₃O₃(OH)₅]₂(H₂O)₄·2H₂O | — | — |
| Inderite | MgB₃O₃(OH)₅·5H₂O | — | — |
| Innsbruckite | Mn₃₃(Si₂O₅)₁₄(OH)₃₈ | — | — |
| Interliveingite | AgPb₁₈As₂₅S₅₆ | — | — |
| Inyoite | CaB₃O₃(OH)₅(H₂O)₃·H₂O | 2.0 | — |
| Irhtemite | Ca₄Mg(AsO₄)₂(HAsO₄)₂·4H₂O | — | — |
| Iridarsenite | (Ir,Ru)As₂ | — | 10.90 g/cm³ |
| Ishikawaite | (U,Fe,Y)NbO₄ | — | — |
| Isoclasite | Ca₂(PO₄)(OH)·2H₂O | — | — |
| Ivsite | Na₃H(SO₄)₂ | — | 2.47 g/cm³ |
| Iwashiroite-(Y) | Y(Ta,Nb)O₄ | — | — |
| Iyoite | MnCuCl(OH)₃ | 3.0 | — |
| Jadarite | LiNaB₃SiO₇(OH) | — | 2.37 g/cm³ |
| Jadeite | NaAlSi₂O₆ | — | — |
| Jagüéite | — | — | — |
| Jahnsite-(CaFeMg) | CaFe²⁺Mg₂Fe³⁺₂(PO₄)₄(OH)₂·8H₂O | — | — |
| Jahnsite-(CaMnFe) | CaMn²⁺Fe²⁺₂Fe³⁺₂(PO₄)₄(OH)₂(H₂O)₈ | — | — |
| Jahnsite-(CaMnMg) | CaMn²⁺Mg₂Fe³⁺₂(PO₄)₄(OH)₂(H₂O)₈ | — | — |
| Jahnsite-(CaMnMn) | CaMn²⁺Mn²⁺₂Fe³⁺₂(PO₄)₄(OH)₂(H₂O)₈ | — | — |
| Jahnsite-(CaMnZn) | — | — | — |
| Jahnsite-(MnMnFe) | Mn²⁺Mn²⁺Fe²⁺₂Fe³⁺₂(PO₄)₄(OH)₂·8H₂O | — | — |
| Jahnsite-(MnMnMg) | Mn²⁺Mn²⁺Mg₂Fe³⁺₂(PO₄)₄(OH)₂(H₂O)₈ | — | — |
| Jahnsite-(MnMnMn) | {Mn²⁺}{Mn²⁺}{Mn²⁺₂}{Fe³⁺₂}(PO₄)₄(OH)₂·8H₂O | — | — |
| Jahnsite-(MnMnZn) | Mn²⁺Mn²⁺Zn₂Fe³⁺₂(PO₄)₄(OH)₂(H₂O)₈ | — | — |
| Jahnsite-(NaFeMg) | NaFe³⁺Mg₂Fe³⁺₂(PO₄)₄(OH)₂·8H₂O | — | — |
| Jahnsite-(NaMnMg) | {(Na,Ca)}{(Mn²⁺,Fe³⁺)}{(Mg,Fe³⁺)₂}{Fe³⁺₂}(PO₄)₄(OH)₂(H₂O)₈ | — | — |
| Jahnsite-(NaMnMn) | — | — | — |
| Jakobssonite | CaAlF₅ | — | 2.94 g/cm³ |
| Jamesonite | Pb₄FeSb₆S₁₄ | 2.5 | — |
| Janhaugite | (Na,Ca)₃(Mn²⁺,Fe²⁺)₃(Ti,Zr,Nb)₂(Si₂O₇)₂O₂(OH,F)₂ | — | — |
| Jarandolite | CaB₃O₄(OH)₃ | — | 2.48 g/cm³ |
| Jarlite | Na₂(Sr,Na)₁₄Mg₂Al₁₂F₆₄(OH,H₂O)₄ | — | — |
| Jasonsmithite | — | — | — |
| Jensenite | Cu²⁺₃Te⁶⁺O₆(H₂O)₂ | — | — |
| Jentschite | TlPbAs₂SbS₆ | — | — |
| Jeppeite | — | — | — |
| Jervisite | NaScSi₂O₆ | 6.0 | 3.09 g/cm³ |
| Jinshajiangite | BaNa(Fe²⁺)₄Ti₂(Si₂O₇)₂O₂(OH)₂F | — | — |
| Joaquinite-(Ce) | NaBa₂Ce₂FeTi₂[Si₄O₁₂]₂O₂(OH,F)·H₂O | — | — |
| Joesmithite | PbCa₂(Mg₃Fe³⁺₂)(Be₂Si₆)O₂₂(OH)₂ | 5.5 | — |
| Johanngeorgenstadtite | — | — | — |
| Johannsenite | CaMn²⁺Si₂O₆ | 6.0 | — |
| Johillerite | NaCuMg₃(AsO₄)₃ | 3.0 | — |
| Johntomaite | — | — | — |
| Jonassonite | Au(Bi,Pb)₅S₄ | — | — |
| Joosteite | Mn²⁺Mn³⁺O(PO₄) | 4.0 | 4.13 g/cm³ |
| Jordanite | Pb₁₄(As,Sb)₆S₂₃ | — | — |
| Juangodoyite | Na₂Cu(CO₃)₂ | — | 2.85 g/cm³ |
| Juansilvaite | Na₅Al₃[AsO₃(OH)]₄[AsO₂(OH)₂]₂(SO₄)₂·4H₂O | — | — |