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Grandfathered minerals
1,125 minerals
| Mineral | Chemical formula | Crystal system | Mohs hardness | Density |
|---|---|---|---|---|
| Calclacite | Ca(CH₃COO)Cl·5H₂O | Monoclinic | 1.0 | — |
| Calderite | (Mn²⁺,Ca)₃(Fe³⁺,Al)₂(SiO₄)₃ | Cubic | 7.0 | — |
| Caledonite | Cu₂Pb₅(SO₄)₃(CO₃)(OH)₆ | Orthorhombic | — | — |
| Callaghanite | Cu₂Mg₂(CO₃)(OH)₆ * 2H₂O | Monoclinic | — | — |
| Calomel | HgCl | Tetragonal | — | 6.92 g/cm³ |
| Cancrinite | (Na,Ca,☐)₈(Al₆Si₆)O₂₄(CO₃,SO₄)₂·2H₂O | Hexagonal | — | — |
| Canfieldite | Ag₈SnS₆ | Orthorhombic | — | 6.23 g/cm³ |
| Cannizzarite | Pb₄₈Bi₅₆S₁₃₂ | — | — | — |
| Caracolite | Na₂(Pb₂Na)(SO₄)₃Cl | Monoclinic | — | — |
| Carminite | PbFe³⁺₂(AsO₄)₂(OH)₂ | — | 3.5 | — |
| Carnallite | KMgCl₃·6H₂O | Orthorhombic | 2.5 | — |
| Carnotite | K₂(UO₂)₂(VO₄)₂·3H₂O | Monoclinic | 2.0 | — |
| Carobbiite | KF | Cubic | — | 2.58 g/cm³ |
| Carpholite | Mn²⁺Al₂(Si₂O₆)(OH)₄ | Orthorhombic | — | — |
| Carrollite | CuCo₂S₄ | Cubic | — | 4.92 g/cm³ |
| Cassiterite | SnO₂ | Tetragonal | 6.5 | 6.58 g/cm³ |
| Catapleiite | Na₂ZrSi₃O₉·2H₂O | — | — | — |
| Cattierite | CoS₂ | Cubic | — | 4.85 g/cm³ |
| Celsian | BaAl₂Si₂O₈ | Monoclinic | — | 3.34 g/cm³ |
| Cerussite | PbCO₃ | Orthorhombic | — | 6.60 g/cm³ |
| Cesàrolite | — | — | 4.5 | — |
| Chalcanthite | CuSO₄·5H₂O | Triclinic | 2.5 | — |
| Chalcoalumite | CuAl₄(SO₄)(OH)₁₂ * 3H₂O | Monoclinic | — | — |
| Chalcocite | Cu₂S | Monoclinic | 2.8 | 5.65 g/cm³ |
| Chalcocyanite | CuSO₄ | Orthorhombic | 3.5 | 3.94 g/cm³ |
| Chalcomenite | CuSe⁴⁺O₃·2H₂O | — | — | — |
| Chalconatronite | Na₂Cu(CO₃)₂ * 3H₂O | Monoclinic | — | — |
| Chalcophanite | ZnMn⁴⁺₃O₇·3H₂O | Trigonal | 2.5 | — |
| Chalcophyllite | Cu₁₈Al₂(AsO₄)₄(SO₄)₃(OH)₂₄·36H₂O | Trigonal | 2.0 | — |
| Chalcopyrite | CuFeS₂ | Tetragonal | 3.5 | — |
| Chalcosiderite | CuFe³⁺₆(PO₄)₄(OH)₈·4H₂O | Triclinic | — | — |
| Chalcostibite | CuSbS₂ | Orthorhombic | — | 4.95 g/cm³ |
| Chamosite | (Fe²⁺,Mg,Al,Fe³⁺)₆(Si,Al)₄O₁₀(OH,O)₈ | Monoclinic | 3.0 | — |
| Chenevixite | CuFe³⁺(AsO₄)(OH)₂ | Monoclinic | — | — |
| Childrenite | Fe²⁺AlPO₄(OH)₂·H₂O | Orthorhombic | 5.0 | — |
| Chiolite | Na₅Al₃F₁₄ | Tetragonal | — | 3.10 g/cm³ |
| Chkalovite | Na₂BeSi₂O₆ | — | — | 2.61 g/cm³ |
| Chloraluminite | AlCl₃·6H₂O | Trigonal | — | — |
| Chloritoid | (Fe²⁺,Mg,Mn²⁺)Al₂(SiO₄)O(OH)₂ | — | 6.5 | — |
| Chlormanganokalite | K₄[MnCl₆] | Trigonal | — | — |
| Chlorocalcite | KCaCl₃ | Orthorhombic | — | — |
| Chlorophoenicite | (Mn,Mg)₃Zn₂(AsO₄)(OH,O)₆ | Monoclinic | — | — |
| Chlorothionite | K₂Cu(SO₄)Cl₂ | Orthorhombic | — | — |
| Chloroxiphite | Pb₃CuO₂Cl₂(OH)₂ | Monoclinic | — | — |
| Chondrodite | Mg₅(SiO₄)₂F₂ | Monoclinic | — | 3.09 g/cm³ |
| Chromite | Fe²⁺Cr₂O₄ | Cubic | 5.5 | — |
| Chrysoberyl | BeAl₂O₄ | Orthorhombic | 8.5 | 3.71 g/cm³ |
| Cinnabar | HgS | Trigonal | 2.3 | 8.10 g/cm³ |
| Clarkeite | (Na,Ca,Pb)(UO₂)O(OH) * ₀-₁H₂O | Trigonal | — | — |
| Claudetite | As₂O₃ | Monoclinic | — | — |
| Clausthalite | PbSe | Cubic | — | 8.05 g/cm³ |
| Clinochlore | Mg₅Al(AlSi₃O₁₀)(OH)₈ | Monoclinic | — | — |
| Clinoclase | Cu₃AsO₄(OH)₃ | Monoclinic | — | — |
| Clinohedrite | CaZn(SiO₄) * H₂O | Monoclinic | — | — |
| Clinohumite | Mg₉(SiO₄)₄F₂ | Monoclinic | 6.0 | — |
| Clinoungemachite | (Na, K, Fe, SO₄) | Monoclinic | — | — |
| Cobaltite | CoAsS | Orthorhombic | 5.5 | 6.26 g/cm³ |
| Coccinite | HgI₂ | Tetragonal | 2.0 | 5.89 g/cm³ |
| Coffinite | U(SiO₄) * nH₂O | Tetragonal | — | — |
| Cohenite | Fe₃C | Orthorhombic | — | — |
| Colemanite | CaB₃O₄(OH)₃·H₂O | Monoclinic | 4.5 | — |
| Collinsite | Ca₂Mg(PO₄)₂·2H₂O | Triclinic | — | — |
| Coloradoite | HgTe | Cubic | — | 7.65 g/cm³ |
| Colusite | Cu₁₂VAs₃S₁₆ | Cubic | — | — |
| Combeite | Na₂Ca₂Si₃O₉ | 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 | — | — | — |
| Copiapite | Fe²⁺Fe³⁺₄(SO₄)₆(OH)₂·20H₂O | Triclinic | — | — |
| Cordierite | Mg₂Al₄Si₅O₁₈ | Orthorhombic | — | 2.42 g/cm³ |
| Cornetite | Cu₃PO₄(OH)₃ | Orthorhombic | — | — |
| Cornwallite | Cu₅(AsO₄)₂(OH)₄ | Monoclinic | 4.5 | — |
| Coronadite | Pb(Mn⁴⁺₆Mn³⁺₂)O₁₆ | Monoclinic | — | — |
| Corrensite | (Mg,Fe)₉((Si,Al)₈O₂₀)(OH)₁₀ * nH₂O | — | — | — |
| Corundum | Al₂O₃ | Trigonal | 9.0 | — |
| Corvusite | (Na,Ca,K)₁₋ₓ(V⁵⁺,V⁴⁺,Fe²⁺)₈O₂₀·4H₂O | Monoclinic | — | — |
| Cosalite | Pb₂Bi₂S₅ | Orthorhombic | — | — |
| Cotunnite | PbCl₂ | Orthorhombic | 2.5 | 5.77 g/cm³ |
| Covellite | CuS | Hexagonal | — | — |
| Crednerite | CuMnO₂ | Monoclinic | — | 5.44 g/cm³ |