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Minerals
6,131 minerals
| Mineral | Chemical formula | Crystal system | Mohs hardness | Density |
|---|---|---|---|---|
| Cobaltneustädtelite | — | — | 4.5 | — |
| Cobaltoblödite | Na₂Co(SO₄)₂·4H₂O | Monoclinic | — | — |
| Cobaltomenite | CoSe⁴⁺O₃·2H₂O | — | — | — |
| Cobaltpentlandite | Co₉S₈ | Cubic | — | 5.70 g/cm³ |
| Cobalttsumcorite | PbCo₂(AsO₄)₂·2H₂O | — | — | 5.31 g/cm³ |
| Cobaltzippeite | Co(UO₂)₂(SO₄)O₂ * 3.₅H₂O | Monoclinic | — | — |
| Coccinite | HgI₂ | Tetragonal | 2.0 | 5.89 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 |
| Coffinite | U(SiO₄) * nH₂O | Tetragonal | — | — |
| Cohenite | Fe₃C | Orthorhombic | — | — |
| Coiraite | (Pb,Sn)₁₂.₅As₃Sn₅FeS₂₈ | Monoclinic | — | — |
| Colchesterite | Bi³⁺₂Mo⁶⁺₂O₉ | Monoclinic | — | — |
| Coldwellite | Pd₃Ag₂S | Cubic | — | — |
| Colemanite | CaB₃O₄(OH)₃·H₂O | Monoclinic | 4.5 | — |
| Colimaite | K₃VS₄ | Orthorhombic | — | 2.21 g/cm³ |
| Colinowensite | BaCuSi₂O₆ | Tetragonal | — | — |
| Collinsite | Ca₂Mg(PO₄)₂·2H₂O | Triclinic | — | — |
| Colomeraite | NaTi³⁺Si₂O₆ | Monoclinic | — | — |
| Coloradoite | HgTe | Cubic | — | 7.65 g/cm³ |
| Colquiriite | CaLiAlF₆ | Trigonal | — | 2.86 g/cm³ |
| Columbite-(Fe) | Fe²⁺Nb₂O₆ | Orthorhombic | — | — |
| Columbite-(Mg) | MgNb₂O₆ | Orthorhombic | — | 4.89 g/cm³ |
| Columbite-(Mn) | Mn²⁺Nb₂O₆ | Orthorhombic | — | — |
| Colusite | Cu₁₂VAs₃S₁₆ | Cubic | — | — |
| Comancheite | Hg²⁺₅₅N³⁻₂₄(NH₂,OH)₄(Cl,Br)₃₄ | Orthorhombic | — | — |
| Combeite | Na₂Ca₂Si₃O₉ | Trigonal | — | — |
| Comblainite | Ni₄Co³⁺₂(CO₃)(OH)₁₂·3H₂O | Trigonal | — | — |
| Compreignacite | K₂(UO₂)₆O₄(OH)₆·7H₂O | Orthorhombic | — | — |
| Congolite | (Fe²⁺,Mg)₃(B₇O₁₃)Cl | Trigonal | — | — |
| Conichalcite | CaCuAsO₄(OH) | Orthorhombic | 4.5 | — |
| Connellite | Cu₃₆(SO₄)(OH)₆₂Cl₈·6H₂O | Hexagonal | 3.0 | — |
| Cookeite | (Al,Li)₃Al₂(Si,Al)₄O₁₀(OH)₈ | — | — | — |
| Coombsite | K(Mn,Fe,Mg)₁₃(Si,Al)₁₈O₄₂(OH)₁₄ | — | — | — |
| Cooperite | PtS | Tetragonal | — | 10.10 g/cm³ |
| Coparsite | Cu₄(AsO₄,VO₄)O₂Cl | Orthorhombic | — | — |
| Copiapite | Fe²⁺Fe³⁺₄(SO₄)₆(OH)₂·20H₂O | Triclinic | — | — |
| Coquandite | Sb³⁺₆₊ₓO₈₊ₓ(SO₄)(OH)ₓ·H₂O₁₋ₓ (x = 0.3) | Triclinic | — | — |
| Coquimbite | — | Trigonal | 2.0 | — |
| Coralloite | Mn²⁺Mn³⁺₂(AsO₄)₂(OH)₂·4H₂O | Triclinic | — | — |
| Corderoite | Hg²⁺₃S₂Cl₂ | Cubic | — | — |
| Cordierite | Mg₂Al₄Si₅O₁₈ | Orthorhombic | — | 2.42 g/cm³ |
| Cordylite-(Ce) | (Na,Ca,☐)BaCe₂(CO₃)₄(F,O) | Hexagonal | 4.5 | — |
| Cordylite-(La) | NaCaBa₂La₃Sr(CO₃)₈F₂ | Hexagonal | — | — |
| Corkite | PbFe³⁺₃(SO₄)(PO₄)(OH)₆ | Trigonal | — | — |
| Cornetite | Cu₃PO₄(OH)₃ | Orthorhombic | — | — |
| Cornubite | Cu₅(AsO₄)₂(OH)₄ | Triclinic | 4.0 | — |
| Cornwallite | Cu₅(AsO₄)₂(OH)₄ | Monoclinic | 4.5 | — |
| Coronadite | Pb(Mn⁴⁺₆Mn³⁺₂)O₁₆ | Monoclinic | — | — |
| Correianevesite | Fe²⁺Mn²⁺₂(PO₄)₂·3H₂O | Orthorhombic | — | — |
| Corrensite | (Mg,Fe)₉((Si,Al)₈O₂₀)(OH)₁₀ * nH₂O | — | — | — |
| Cortesognoite | CaV₂Si₂O₇(OH)₂·H₂O | Orthorhombic | — | — |
| Corundum | Al₂O₃ | Trigonal | 9.0 | — |
| Corvusite | (Na,Ca,K)₁₋ₓ(V⁵⁺,V⁴⁺,Fe²⁺)₈O₂₀·4H₂O | Monoclinic | — | — |
| Cosalite | Pb₂Bi₂S₅ | 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 |
| Cotunnite | PbCl₂ | Orthorhombic | 2.5 | 5.77 g/cm³ |
| Coulsonite | Fe²⁺V³⁺₂O₄ | Cubic | — | — |
| Cousinite | MgU₂Mo₂O₁₁ * 6H₂O | — | — | — |
| Coutinhoite | Th_{x}Ba_(₁-₂x)(UO₂)₂Si₅O₁₃ * (H₂O)₁+y | — | — | — |
| Covellite | CuS | Hexagonal | — | — |
| Cowlesite | Ca(Al₂Si₃)O₁₀·(5-6)H₂O | Orthorhombic | 5.0 | — |
| Coyoteite | NaFe₃S₅·2H₂O | Triclinic | — | — |
| Crandallite | CaAl₃(PO₄)(PO₃OH)(OH)₆ | Trigonal | 5.0 | — |
| Cranswickite | Mg(SO₄)·4H₂O | Monoclinic | — | — |
| Crawfordite | Na₃Sr(CO₃)(PO₄) | Monoclinic | — | — |
| Creaseyite | Cu₂Pb₂Fe³⁺₂Si₅O₁₇·6H₂O | Orthorhombic | — | — |
| Crednerite | CuMnO₂ | Monoclinic | — | 5.44 g/cm³ |
| Creedite | Ca₃Al₂(SO₄)(OH)₂F₈·2H₂O | Monoclinic | 4.0 | — |
| 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 | — | — |
| Cristobalite | SiO₂ | Tetragonal | 6.5 | 2.63 g/cm³ |
| Crocobelonite | — | Orthorhombic | — | — |
| Crocoite | PbCrO₄ | Monoclinic | — | 6.11 g/cm³ |
| Cronstedtite | Fe²⁺₂Fe³⁺((Si,Fe³⁺)₂O₅)(OH)₄ | — | 3.5 | — |
| Cronusite | Ca₀.₂CrS₂ * ₂ H₂O | — | — | — |