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Approved minerals
4,194 minerals
| Mineral | Chemical formula | Crystal system | Mohs hardness | Density |
|---|---|---|---|---|
| Chukotkaite | — | Monoclinic | — | — |
| Chursinite | (Hg+₂)₀.₅Hg²⁺(AsO₄) | — | — | — |
| Chvaleticeite | Mn(SO₄)(H₂O)₆ | Monoclinic | — | — |
| Chvilevaite | Na(Cu,Fe,Zn)₂S₄ | — | — | — |
| Cianciulliite | Mg₂Mn²⁺Zn₂(OH)₁₀·2-4H₂O | — | — | — |
| Ciriottiite | Cu(Cu,Ag)₃Pb₁₉(Sb,As)₂₂(As₂)S₅₆ | Monoclinic | — | — |
| Clairite | (NH₄)₂Fe³⁺₃(SO₄)₄(OH)₃·3H₂O | Triclinic | — | — |
| Clearcreekite | (Hg+₂)₁.₅(CO₃)(OH) * 2H₂O | Monoclinic | — | — |
| Clerite | MnSb₂S₄ | Orthorhombic | — | — |
| Cleusonite | (Pb,Sr)(U₄+,U₆+)(Fe²⁺,Zn)₂(Ti,Fe²⁺,Fe³⁺)₁₈(O,OH)₃₈ | Trigonal | — | — |
| Cliffordite | UTe⁴⁺₃O₉ | — | — | — |
| Clino-ferri-holmquistite | ☐Li₂(Mg₃Fe³⁺₂)Si₈O₂₂(OH)₂ | Monoclinic | — | — |
| Clino-oscarkempffite | Ag₁₅Pb₆Sb₂₁Bi₁₈S₇₂ | Monoclinic | — | — |
| Clino-suenoite | ☐Mn₂²⁺Mg₅Si₈O₂₂(OH)₂ | Monoclinic | — | — |
| Clinoatacamite | Cu₂(OH)₃Cl | Monoclinic | 3.0 | — |
| Clinobehoite | Be(OH)₂ | Monoclinic | — | — |
| Clinobisvanite | Bi(VO₄) | Monoclinic | — | 7.07 g/cm³ |
| Clinocervantite | Sb³⁺Sb₅+O₄ | Monoclinic | — | — |
| Clinoenstatite | MgSiO₃ | Monoclinic | — | — |
| Clinoferrosilite | Fe²⁺SiO₃ | Monoclinic | — | — |
| Clinojimthompsonite | (Mg,Fe)₅Si₆O₁₆(OH)₂ | Monoclinic | — | — |
| Clinokurchatovite | Ca(Mg,Fe²⁺,Mn²⁺)[B₂O₅] | Monoclinic | — | — |
| Clinometaborite | HBO₂ | Monoclinic | — | 2.10 g/cm³ |
| Clinophosinaite | Na₁₂(Ca,Sr)₄(Si₄O₁₂)(PO₄)₄ | Monoclinic | — | — |
| Clinoptilolite-Ca | Ca₃(Si₃₀Al₆)O₇₂*₂₀H₂O | Monoclinic | — | — |
| Clinoptilolite-Na | Na₆(Si₃₀Al₆)O₇₂*₂₀H₂O | Monoclinic | — | — |
| Clinosafflorite | CoAs₂ | Monoclinic | — | 7.55 g/cm³ |
| Clinozoisite | Ca₂Al₃(Si₂O₇)(SiO₄)O(OH) | Monoclinic | — | — |
| Clintonite | CaAlMg₂(SiAl₃)O₁₀(OH)₂ | Monoclinic | — | — |
| Clogauite | PbBi₄Te₄S₃ | Trigonal | — | — |
| Cloncurryite | Cu₀.₅(VO)₀.₅Al₂(PO₄)₂F₂·5H₂O | Monoclinic | — | — |
| Cloudite | BaFe³⁺₃(PO₄)(SO₄)(OH)₆ | Trigonal | — | — |
| Coalingite | Mg₁₀Fe³⁺₂(CO₃)(OH)₂₄·2H₂O | Trigonal | — | — |
| Cobaltarthurite | (Co,Mg)Fe³⁺₂(AsO₄)₂(OH)₂ * 4H₂O | — | — | — |
| Cobaltaustinite | CaCo(AsO₄)(OH) | Orthorhombic | — | — |
| Cobaltkieserite | Co(SO₄)(H₂O) | Monoclinic | — | — |
| Cobaltkoritnigite | Co(AsO₃OH)·H₂O | Triclinic | — | — |
| Cobaltlotharmeyerite | CaCo₂(AsO₄)₂·2H₂O | — | 4.5 | 4.13 g/cm³ |
| Cobaltneustädtelite | — | — | 4.5 | — |
| Cobaltoblödite | Na₂Co(SO₄)₂·4H₂O | Monoclinic | — | — |
| Cobalttsumcorite | PbCo₂(AsO₄)₂·2H₂O | — | — | 5.31 g/cm³ |
| Cochromite | (Co,Ni,Fe)(Cr,Al)₂O₄ | Cubic | — | — |
| Coconinoite | Fe³⁺₂Al₂(UO₂)₂(PO₄)₄(SO₄)(OH)₂·20H₂O | — | — | — |
| Coesite | SiO₂ | Monoclinic | — | 2.63 g/cm³ |
| Coiraite | (Pb,Sn)₁₂.₅As₃Sn₅FeS₂₈ | Monoclinic | — | — |
| Colchesterite | Bi³⁺₂Mo⁶⁺₂O₉ | Monoclinic | — | — |
| Coldwellite | Pd₃Ag₂S | Cubic | — | — |
| Colimaite | K₃VS₄ | Orthorhombic | — | 2.21 g/cm³ |
| Colinowensite | BaCuSi₂O₆ | Tetragonal | — | — |
| Colomeraite | NaTi³⁺Si₂O₆ | Monoclinic | — | — |
| Colquiriite | CaLiAlF₆ | Trigonal | — | 2.86 g/cm³ |
| Comblainite | Ni₄Co³⁺₂(CO₃)(OH)₁₂·3H₂O | Trigonal | — | — |
| Compreignacite | K₂(UO₂)₆O₄(OH)₆·7H₂O | Orthorhombic | — | — |
| Congolite | (Fe²⁺,Mg)₃(B₇O₁₃)Cl | Trigonal | — | — |
| Coombsite | K(Mn,Fe,Mg)₁₃(Si,Al)₁₈O₄₂(OH)₁₄ | — | — | — |
| Coparsite | Cu₄(AsO₄,VO₄)O₂Cl | Orthorhombic | — | — |
| Coquandite | Sb³⁺₆₊ₓO₈₊ₓ(SO₄)(OH)ₓ·H₂O₁₋ₓ (x = 0.3) | Triclinic | — | — |
| Coralloite | Mn²⁺Mn³⁺₂(AsO₄)₂(OH)₂·4H₂O | Triclinic | — | — |
| Corderoite | Hg²⁺₃S₂Cl₂ | Cubic | — | — |
| Cordylite-(La) | NaCaBa₂La₃Sr(CO₃)₈F₂ | Hexagonal | — | — |
| Cornubite | Cu₅(AsO₄)₂(OH)₄ | Triclinic | 4.0 | — |
| Correianevesite | Fe²⁺Mn²⁺₂(PO₄)₂·3H₂O | Orthorhombic | — | — |
| Cortesognoite | CaV₂Si₂O₇(OH)₂·H₂O | Orthorhombic | — | — |
| Coskrenite-(Ce) | (Ce,Nd,La)₂(C₂O₄)(SO₄)₂ * 12H₂O | Triclinic | — | 2.88 g/cm³ |
| Cossaite | (Mg₀.₅,☐)Al₆(SO₄)₆(HSO₄)F₆·36H₂O | Trigonal | — | — |
| Costibite | CoSbS | — | — | 7.02 g/cm³ |
| Coutinhoite | Th_{x}Ba_(₁-₂x)(UO₂)₂Si₅O₁₃ * (H₂O)₁+y | — | — | — |
| Cowlesite | Ca(Al₂Si₃)O₁₀·(5-6)H₂O | Orthorhombic | 5.0 | — |
| Coyoteite | NaFe₃S₅·2H₂O | Triclinic | — | — |
| Cranswickite | Mg(SO₄)·4H₂O | Monoclinic | — | — |
| Crawfordite | Na₃Sr(CO₃)(PO₄) | Monoclinic | — | — |
| Creaseyite | Cu₂Pb₂Fe³⁺₂Si₅O₁₇·6H₂O | Orthorhombic | — | — |
| Crerarite | Pt₂-x(Bi,Pb)₁₁(S,Se)₁₁ | Triclinic | — | — |
| Crichtonite | Sr(Mn,Y,U)Fe₂(Ti,Fe,Cr,V)₁₈(O,OH)₃₈ | — | — | — |
| Crimsonite | PbFe³⁺₂(PO₄)₂(OH)₂ | Orthorhombic | — | — |
| Crocobelonite | — | Orthorhombic | — | — |
| Cronusite | Ca₀.₂CrS₂ * ₂ H₂O | — | — | — |
| Crowningshieldite | (Ni₀.₉Fe₀.₁₀)S | Hexagonal | — | — |
| Cryobostryxite | KZnCl₃·2H₂O | Monoclinic | — | — |
| Cryptochalcite | K₂Cu₅O(SO₄)₅ | Triclinic | — | — |