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Grandfathered minerals
1,125 minerals
| Mineral | Chemical formula | Crystal system | Mohs hardness | Density |
|---|---|---|---|---|
| Creedite | Ca₃Al₂(SO₄)(OH)₂F₈·2H₂O | Monoclinic | 4.0 | — |
| Cristobalite | SiO₂ | Tetragonal | 6.5 | 2.63 g/cm³ |
| Crocoite | PbCrO₄ | Monoclinic | — | 6.11 g/cm³ |
| Cronstedtite | Fe²⁺₂Fe³⁺((Si,Fe³⁺)₂O₅)(OH)₄ | — | 3.5 | — |
| Crookesite | Cu₇TlSe₄ | Tetragonal | — | — |
| Cryolite | Na₃AlF₆ | Monoclinic | — | 3.06 g/cm³ |
| Cryolithionite | Na₃Al₂(LiF₄)₃ | Cubic | — | 2.87 g/cm³ |
| Cryptohalite | (NH₄)₂SiF₆ | Cubic | — | 2.01 g/cm³ |
| Cubanite | CuFe₂S₃ | Orthorhombic | 3.5 | — |
| Cuprite | Cu₂O | Cubic | — | — |
| Cuprobismutite | Cu₈AgBi₁₃S₂₄ | — | — | — |
| Cuprocopiapite | CuFe₄(SO₄)₆(OH)₂ * 20H₂O | — | — | — |
| Cuprosklodowskite | Cu(UO₂)₂(SiO₃OH)₂·6H₂O | Triclinic | 4.0 | — |
| Cuprotungstite | Cu₂(WO₄)(OH)₂ | Tetragonal | — | — |
| Curite | Pb₃(UO₂)₈O₈(OH)₆ * 3H₂O | Orthorhombic | — | — |
| Cuspidine | Ca₈(Si₂O₇)₂F₄ | Monoclinic | — | — |
| Cyanochroite | K₂Cu(SO₄)₂ * 6H₂O | — | — | — |
| Cylindrite | FePb₃Sn₄Sb₂S₁₄ | Triclinic | 2.5 | — |
| Cymrite | BaAl₂Si₂(O,OH)₈ * H₂O | Monoclinic | — | — |
| Cyrilovite | NaFe³⁺₃(PO₄)₂(OH)₄ * 2H₂O | Tetragonal | — | — |
| Dalyite | K₂ZrSi₆O₁₅ | — | 7.5 | — |
| Danalite | Be₃Fe²⁺₄(SiO₄)₃S | Cubic | — | — |
| Danburite | CaB₂Si₂O₈ | Orthorhombic | — | — |
| Datolite | CaB(SiO₄)(OH) | Monoclinic | — | — |
| Daubréeite | BiO(OH) | — | — | — |
| Daubréelite | FeCr₂S₄ | Cubic | — | 3.81 g/cm³ |
| Davreuxite | Mn²⁺Al₆Si₄O₁₇(OH)₂ | Monoclinic | — | — |
| Davyne | (Na,Ca,K)₈(Si,Al)₁₂O₂₄(Cl,SO₄,CO₃)₂₋₃ | Hexagonal | — | — |
| Dawsonite | NaAl(CO₃)(OH)₂ | Orthorhombic | 3.0 | 2.48 g/cm³ |
| Delafossite | Cu¹⁺Fe³⁺O₂ | Trigonal | — | — |
| Derbylite | Fe³⁺₄Ti⁴⁺₃Sb³⁺O₁₃(OH) | Monoclinic | — | — |
| Descloizite | PbZn(VO₄)(OH) | Orthorhombic | — | 6.21 g/cm³ |
| Dewindtite | H₂Pb₃(UO₂)₆O₄(PO₄)₄·12H₂O | — | 2.8 | — |
| Diadochite | Fe³⁺₂(PO₄)(SO₄)(OH)·6H₂O | Amorphous | — | — |
| Diamond | C | Cubic | 10.0 | 3.52 g/cm³ |
| Diaphorite | Ag₃Pb₂Sb₃S₈ | Monoclinic | — | 6.04 g/cm³ |
| Diaspore | AlO(OH) | Orthorhombic | — | 3.41 g/cm³ |
| Dickite | Al₂Si₂O₅(OH)₄ | Monoclinic | — | — |
| Dietrichite | ZnAl₂(SO₄)₄·22H₂O | Monoclinic | 2.0 | — |
| Dietzeite | Ca₂(IO₃)₂(CrO₄)·H₂O | Monoclinic | — | — |
| Dimorphite | As₄S₃ | Orthorhombic | — | — |
| Dinite | C₂₀H₃₆ | Orthorhombic | 1.0 | — |
| Dioptase | CuSiO₃·H₂O | Trigonal | 5.0 | — |
| Dittmarite | (NH₄)Mg(PO₄)·H₂O | — | — | — |
| Dixenite | CuMn²⁺₁₄Fe²⁺(SiO₄)₂(As₅+O₄)(As³⁺O₃)₅(OH)₆ | — | — | — |
| Dolerophanite | Cu₂O(SO₄) | Monoclinic | 3.0 | — |
| Dolomite | CaMg(CO₃)₂ | Trigonal | — | 2.87 g/cm³ |
| Doloresite | V⁴⁺₃O₄(OH)₄ | Monoclinic | — | — |
| Domeykite | Cu₃As | Cubic | — | — |
| Donbassite | Al₄.₃₃(AlSi₃O₁₀)(OH)₈ | — | — | — |
| Douglasite | K₂Fe²⁺Cl₄·2H₂O | — | — | — |
| Dravite | NaMg₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃OH | Trigonal | 7.0 | — |
| Dufrénite | — | Monoclinic | — | — |
| Dufrénoysite | Pb₂As₂S₅ | Monoclinic | 3.0 | — |
| Duftite | PbCuAsO₄(OH) | Orthorhombic | 4.5 | — |
| Dumontite | Pb₂(UO₂)₃O₂(PO₄)₂·5H₂O | — | — | — |
| Dundasite | PbAl₂(CO₃)₂(OH)₄·H₂O | Orthorhombic | 2.0 | — |
| Durangite | NaAlAsO₄F | Monoclinic | 5.5 | 3.72 g/cm³ |
| Duttonite | V⁴⁺O(OH)₂ | Monoclinic | — | — |
| Dyscrasite | Ag₃₊ₓSb₁₋ₓ (x~0.2) | Orthorhombic | — | — |
| Earlandite | Ca₃(C₆H₅O₇)₂·4H₂O | Monoclinic | — | — |
| Ecdemite | Pb₆As³⁺₂O₇Cl₄ | — | — | — |
| Edingtonite | Ba(Si₃Al₂)O₁₀·4H₂O | Orthorhombic | — | — |
| Eglestonite | ([Hg⁺]₂)₃OCl₃(OH) | Cubic | 2.5 | — |
| Eitelite | Na₂Mg(CO₃)₂ | Trigonal | 3.5 | 2.80 g/cm³ |
| Elbaite | Na(Li₁.₅Al₁.₅)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH) | Trigonal | 7.0 | — |
| Elpasolite | K₂NaAlF₆ | Cubic | 2.5 | 2.86 g/cm³ |
| Elpidite | Na₂ZrSi₆O₁₅·3H₂O | Orthorhombic | 5.0 | — |
| Emmonsite | Fe³⁺₂(Te⁴⁺O₃)₃·2H₂O | — | 5.0 | — |
| Emplectite | CuBiS₂ | Orthorhombic | 2.0 | 6.37 g/cm³ |
| Enargite | Cu₃AsS₄ | Orthorhombic | 3.0 | — |
| Englishite | K₃Na₂Ca₁₀Al₁₅(PO₄)₂₁(OH)₇·26H₂O | Monoclinic | 3.0 | — |
| Eosphorite | Mn²⁺AlPO₄(OH)₂·H₂O | — | 5.0 | — |
| Epididymite | Na₂Be₂Si₆O₁₅·H₂O | — | — | — |
| Epidote | {Ca₂}{Al₂Fe³⁺}(Si₂O₇)(SiO₄)O(OH) | Monoclinic | — | — |
| Epsomite | MgSO₄·7H₂O | Orthorhombic | 2.0 | 1.67 g/cm³ |
| Ericaite | Fe²⁺₃B₇O₁₃Cl | Orthorhombic | — | — |
| Eriochalcite | CuCl₂·2H₂O | Orthorhombic | — | — |
| Erythrite | Co₃(AsO₄)₂·8H₂O | Monoclinic | — | — |
| Erythrosiderite | K₂Fe³⁺Cl₅·H₂O | — | — | — |