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Grandfathered minerals
1,125 minerals
| Mineral | Chemical formula | Crystal system | Mohs hardness | Density |
|---|---|---|---|---|
| Lawrencite | FeCl₂ | Trigonal | — | 3.17 g/cm³ |
| Lawsonite | CaAl₂Si₂O₇(OH)₂·H₂O | Orthorhombic | 7.5 | — |
| Lead | Pb | Cubic | — | — |
| Leadhillite | Pb₄(SO₄)(CO₃)₂(OH)₂ | Monoclinic | — | — |
| Lecontite | (NH₄,K)NaSO₄ * 2H₂O | Orthorhombic | — | — |
| Legrandite | Zn₂AsO₄(OH)·H₂O | Monoclinic | — | — |
| Leightonite | K₂Ca₂Cu(SO₄)₄·2H₂O | — | — | — |
| Lengenbachite | Ag₄Cu₂Pb₁₈As₁₂S₃₉ | — | — | — |
| Leonite | K₂Mg(SO₄)₂·4H₂O | — | 2.8 | 2.20 g/cm³ |
| Lermontovite | U(PO₄)(OH) * H₂O | — | — | — |
| Letovicite | (NH₄)₃H(SO₄)₂ | Triclinic | — | — |
| Leucophanite | NaCaBeSi₂O₆F | Orthorhombic | — | 2.97 g/cm³ |
| Leucophoenicite | Mn²⁺₇(SiO₄)₃(OH)₂ | Monoclinic | — | — |
| Leucophosphite | KFe³⁺₂(PO₄)₂(OH)(H₂O)₂ | — | 3.5 | — |
| Leucosphenite | BaNa₄Ti₂B₂Si₁₀O₃₀ | Monoclinic | — | — |
| Libethenite | Cu₂PO₄(OH) | Orthorhombic | 4.0 | — |
| Liebigite | Ca₂(UO₂)(CO₃)₃·11H₂O | Orthorhombic | — | 2.41 g/cm³ |
| Likasite | Cu₃(NO₃)(OH)₅ * 2H₂O | Orthorhombic | — | — |
| Lillianite | Pb₃₋₂ₓAgₓBi₂₊ₓS₆ | — | — | — |
| Lime (mineral) | CaO | Cubic | — | 3.35 g/cm³ |
| Linarite | PbCuSO₄(OH)₂ | Monoclinic | 2.5 | — |
| Lindgrenite | Cu₃(MoO₄)₂(OH)₂ | Monoclinic | 4.5 | — |
| Linnaeite | Co₃S₄ | Cubic | — | 4.77 g/cm³ |
| Lipscombite | Fe²⁺Fe³⁺₂(PO₄)₂(OH)₂ | — | — | — |
| Liroconite | Cu₂AlAsO₄(OH)₄·4H₂O | Monoclinic | — | — |
| Liskeardite | [(Al,Fe)₃₂(AsO₄)₁₈(OH)₄₂(H₂O)₂₂] * 5₂H₂O | Monoclinic | — | — |
| Litharge | PbO | Tetragonal | — | 8.81 g/cm³ |
| Lithiophilite | LiMn²⁺(PO₄) | Orthorhombic | — | — |
| Lithiophorite | (Al,Li)Mn⁴⁺O₂(OH)₂ | — | — | — |
| Lithiophosphate | Li₃PO₄ | Orthorhombic | — | — |
| Liveingite | Pb₂₀As₂₄S₅₆ | — | — | — |
| Livingstonite | HgSb₄S₆(S₂) | Monoclinic | — | 4.79 g/cm³ |
| Lizardite | Mg₃Si₂O₅(OH)₄ | Monoclinic | 2.5 | 2.49 g/cm³ |
| Lorenzenite | Na₂Ti₂O₃(Si₂O₆) | Orthorhombic | 6.0 | 3.31 g/cm³ |
| Loseyite | (Mn²⁺,Zn,Mg)₄Zn₃(CO₃)₂(OH)₁₀ | Monoclinic | — | — |
| Lovozerite | Na₃CaZrSi₆O₁₅(OH)₃ | — | — | — |
| Ludlamite | Fe²⁺₃(PO₄)₂·4H₂O | Monoclinic | — | — |
| Ludwigite | Mg₂Fe³⁺O₂(BO₃) | Orthorhombic | 5.5 | — |
| Luzonite | Cu₃AsS₄ | Tetragonal | 3.5 | — |
| Låvenite | — | Monoclinic | — | — |
| Löllingite | FeAs₂ | Orthorhombic | — | 7.60 g/cm³ |
| Löweite | Na₁₂Mg₇(SO₄)₁₃·15H₂O | Trigonal | — | — |
| Lüneburgite | Mg₃[B₂(OH)₆(PO₄)₂]·6H₂O | Triclinic | 2.0 | — |
| Mackayite | Fe³⁺Te⁴⁺₂O₅(OH) | — | — | — |
| Magnesiochromite | MgCr³⁺₂O₄ | Cubic | 5.5 | — |
| Magnesiocopiapite | MgFe³⁺₄(SO₄)₆(OH)₂ * 20H₂O | — | — | — |
| Magnesioferrite | MgFe³⁺₂O₄ | Cubic | — | — |
| Magnetite | Fe²⁺Fe³⁺₂O₄ | Cubic | 6.0 | 5.17 g/cm³ |
| Magnioursilite | Mg₄(UO₂)₄(Si₂O₅)₅(OH)₆·20H₂O | — | — | — |
| Magnolite | Hg¹⁺₂Te⁴⁺O₃ | — | — | — |
| Malachite | Cu₂(CO₃)(OH)₂ | Monoclinic | 3.8 | 3.85 g/cm³ |
| Maldonite | Au₂Bi | Cubic | — | — |
| Malladrite | Na₂[SiF₆] | Trigonal | — | — |
| Mallardite | Mn²⁺SO₄·7H₂O | Monoclinic | 2.0 | — |
| Manandonite | Li₂Al₄(Si₂AlB)O₁₀(OH)₈ | Orthorhombic | 2.5 | — |
| Manganberzeliite | (NaCa₂)Mn²⁺₂(AsO₄)₃ | Cubic | — | — |
| Manganite | Mn³⁺O(OH) | Monoclinic | 4.0 | — |
| Manganolangbeinite | K₂Mn²⁺₂(SO₄)₃ | Cubic | — | — |
| Manganosite | Mn²⁺O | Cubic | — | — |
| Manganostibite | Mn²⁺₇Sb⁵⁺As⁵⁺O₁₂ | Orthorhombic | — | — |
| Mansfieldite | AlAsO₄·2H₂O | — | — | — |
| Marcasite | FeS₂ | Orthorhombic | — | 4.94 g/cm³ |
| Margarosanite | Pb(Ca,Mn²⁺)₂(Si₃O₉) | — | — | — |
| Marialite | Na₄Al₃Si₉O₂₄Cl | Tetragonal | — | — |
| Marrite | AgPbAsS₃ | Monoclinic | — | 5.49 g/cm³ |
| Marshite | CuI | Cubic | 2.5 | — |
| Mascagnite | (NH₄)₂SO₄ | Orthorhombic | — | — |
| Massicot | PbO | Orthorhombic | — | 8.81 g/cm³ |
| Masuyite | Pb(UO₂)₃O₃(OH)₂ * 3H₂O | Orthorhombic | — | 5.08 g/cm³ |
| Matlockite | PbClF | Tetragonal | — | — |
| Matteuccite | NaHSO₄ * H₂O | Monoclinic | — | — |
| Maucherite | Ni₁₁As₈ | Tetragonal | 5.0 | — |
| Mcgovernite | Mn₁₉Zn₃(AsO₄)₃(AsO₃)(SiO₄)₃(OH)₂₁ | — | — | — |
| Meionite | (Ca,Na)₄(Si,Al)₁₂O₂₄(CO₃,SO₄,Cl) | — | — | — |
| Melanotekite | Pb₂Fe³⁺₂(Si₂O₇)O₂ | Orthorhombic | — | — |
| Melanothallite | Cu₂OCl₂ | Orthorhombic | — | — |
| Melanovanadite | Ca(V⁵⁺,V⁴⁺)₄O₁₀·5H₂O | Triclinic | 2.5 | — |
| Melanterite | Fe²⁺SO₄·7H₂O | Monoclinic | 2.0 | — |
| Meliphanite | (Ca,Na)₂(Be,Al)[Si₂O₆(OH,F)] | Tetragonal | — | — |
| Mellite | Al₂[C₆(COO)₆] * 16H₂O | Tetragonal | — | — |