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Monoclinic crystal system
1,774 minerals
| Mineral | Chemical formula | Mohs hardness | Density |
|---|---|---|---|
| Calaverite | AuTe₂ | — | 8.86 g/cm³ |
| Calcioancylite-(Nd) | Nd₂.₈Ca₁.₂(CO₃)₄(OH)₃·H₂O | — | — |
| Calciodelrioite | Ca(VO₃)₂·4H₂O | — | — |
| Calcioferrite | Ca₂Fe³⁺₂(PO₄)₃(OH) * 7H₂O | — | — |
| Calciohatertite | — | — | — |
| Calciojohillerite | NaCaMg₃(AsO₄)₃ | — | — |
| Calcioveatchite | SrCaB₁₁O₁₆(OH)₅·5H₂O | — | — |
| Calcjarlite | NaCa₃Al₃F₁₆ | — | — |
| Calclacite | Ca(CH₃COO)Cl·5H₂O | 1.0 | — |
| Callaghanite | Cu₂Mg₂(CO₃)(OH)₆ * 2H₂O | — | — |
| Camanchacaite | NaCaMg₂[AsO₄][AsO₃(OH)]₂ | — | — |
| Camgasite | CaMg(AsO₄)(OH)·5H₂O | — | — |
| Campigliaite | Cu₄Mn²⁺(SO₄)₂(OH)₆·4H₂O | — | — |
| Campostriniite | (Bi₂.₅Na₀.₅)(NH₄)₂Na₂(SO₄)₆·H₂O | — | — |
| Camérolaite | Cu₆Al₃(OH)₁₈(H₂O)₂[Sb(OH)₆](SO₄) | — | — |
| Canaphite | — | 2.0 | — |
| Canavesite | Mg₂(HBO₃)(CO₃)·5H₂O | — | — |
| Cannonite | Bi₂(SO₄)O(OH)₂ | — | — |
| Canosioite | Ba₂Fe³⁺(AsO₄)₂(OH) | — | — |
| Canutite | NaMn₃[AsO₄][AsO₃(OH)]₂ | — | — |
| Capranicaite | KCaNaAl₄B₄Si₂O₁₈ | — | — |
| Caracolite | Na₂(Pb₂Na)(SO₄)₃Cl | — | — |
| Carboborite | Ca₂Mg[B(OH)₄]₂(CO₃)₂·4H₂O | — | — |
| Carducciite | (Ag₂Sb₂)Pb₁₂(As,Sb)₁₆S₄₀ | — | — |
| Carmichaelite | (Ti,Cr,Fe)[O₂-x(OH)x] | — | — |
| Carnotite | K₂(UO₂)₂(VO₄)₂·3H₂O | 2.0 | — |
| Carpathite | C₂₄H₁₂ | 1.0 | — |
| Caryinite | (Na,Pb)(Ca,Na)CaMn²⁺₂(AsO₄)₃ | — | — |
| Caryochroite | (Na,Sr)₃(Fe³⁺,Mg)₁₀Ti₂Si₁₂O₃₇(H₂O,O,OH)₁₇ | — | — |
| Caseyite | — | — | — |
| Cassedanneite | — | — | — |
| Castellaroite | Mn²⁺₃(AsO₄)₂*₄H₂O | — | — |
| Cebaite-(Ce) | Ba₃Ce₂(CO₃)₅F₂ | — | — |
| Celadonite | — | 2.0 | 3.00 g/cm³ |
| Celsian | BaAl₂Si₂O₈ | — | 3.34 g/cm³ |
| Cerromojonite | CuPbBiSe₃ | — | — |
| Cervandonite-(Ce) | (Ce,Nd,La)(Fe³⁺,Fe²⁺,Ti,Al)₃O₂(Si₂O₇)(As³⁺O₃)(OH) | — | — |
| Chalcoalumite | CuAl₄(SO₄)(OH)₁₂ * 3H₂O | — | — |
| Chalcocite | Cu₂S | 2.8 | 5.65 g/cm³ |
| Chalconatronite | Na₂Cu(CO₃)₂ * 3H₂O | — | — |
| Challacolloite | KPb₂Cl₅ | — | — |
| Chamosite | (Fe²⁺,Mg,Al,Fe³⁺)₆(Si,Al)₄O₁₀(OH,O)₈ | 3.0 | — |
| Chapmanite | — | 2.5 | — |
| Charleshatchettite | CaNb₄O₁₀(OH)₂*₈H₂O | — | — |
| Chenevixite | CuFe³⁺(AsO₄)(OH)₂ | — | — |
| Chervetite | Pb₂(V₂O₇) | — | 6.34 g/cm³ |
| Chevkinite-(Ce) | (Ce,La,Ca,Th)₄(Fe²⁺,Mg)(Fe²⁺,Ti,Fe³⁺)₂(Ti,Fe³⁺)₂(Si₂O₇)₂O₈ | — | — |
| Chinnerite | [Mg(H₂O)₆]Na(H₂O)₂Al₃(PO₄)₂F₆ | — | — |
| Chistyakovaite | Al(UO₂)₂(AsO₄)₂F·6.5H₂O | — | — |
| Chlorophoenicite | (Mn,Mg)₃Zn₂(AsO₄)(OH,O)₆ | — | — |
| Chloroxiphite | Pb₃CuO₂Cl₂(OH)₂ | — | — |
| Chondrodite | Mg₅(SiO₄)₂F₂ | — | 3.09 g/cm³ |
| Chongite | Ca₃Mg₂(AsO₄)₂(AsO₃OH)₂·4H₂O | — | — |
| Chopinite | (Mg,Fe²⁺)₃(PO₄)₂ | — | — |
| Chovanite | Pb₁₅₋₂ₓSb₁₄₊₂ₓS₃₆Oₓ (x~0.2) | — | — |
| Chrisstanleyite | Ag₂Pd₃Se₄ | — | — |
| Christite | TlHgAsS₃ | — | — |
| Christofschäferite-(Ce) | (Ce,La,Ca)₄Mn(Ti,Fe)₃(Fe,Ti)(Si₂O₇)₂O₈ | — | — |
| Chromceladonite | K(Mg,Fe²⁺)(Cr,Al)(Si₄O₁₀)(OH)₂ | — | — |
| Chromio-pargasite | NaCa₂(Mg₄Cr)(Si₆Al₂)O₂₂(OH)₂ | — | — |
| Chukanovite | Fe₂(CO₃)(OH)₂ | — | — |
| Chukotkaite | — | — | — |
| Chvaleticeite | Mn(SO₄)(H₂O)₆ | — | — |
| Ciriottiite | Cu(Cu,Ag)₃Pb₁₉(Sb,As)₂₂(As₂)S₅₆ | — | — |
| Claudetite | As₂O₃ | — | — |
| Clearcreekite | (Hg+₂)₁.₅(CO₃)(OH) * 2H₂O | — | — |
| Clino-ferri-holmquistite | ☐Li₂(Mg₃Fe³⁺₂)Si₈O₂₂(OH)₂ | — | — |
| Clino-ferro-ferri-holmquistite | ☐Li₂(Fe²⁺₃Fe³⁺₂)Si₈O₂₂(OH)₂ | — | — |
| Clino-oscarkempffite | Ag₁₅Pb₆Sb₂₁Bi₁₈S₇₂ | — | — |
| Clino-suenoite | ☐Mn₂²⁺Mg₅Si₈O₂₂(OH)₂ | — | — |
| Clinoatacamite | Cu₂(OH)₃Cl | 3.0 | — |
| Clinobehoite | Be(OH)₂ | — | — |
| Clinobisvanite | Bi(VO₄) | — | 7.07 g/cm³ |
| Clinocervantite | Sb³⁺Sb₅+O₄ | — | — |
| Clinochlore | Mg₅Al(AlSi₃O₁₀)(OH)₈ | — | — |
| Clinoclase | Cu₃AsO₄(OH)₃ | — | — |
| Clinoenstatite | MgSiO₃ | — | — |
| Clinofergusonite-(Nd) | NdNbO₄ | — | 6.18 g/cm³ |
| Clinofergusonite-(Y) | YNbO₄ | — | 5.47 g/cm³ |
| Clinoferrosilite | Fe²⁺SiO₃ | — | — |