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Monoclinic crystal system
1,774 minerals
| Mineral | Chemical formula | Mohs hardness | Density |
|---|---|---|---|
| Králíkite | BaCl₂·2H₂O | — | — |
| Kröhnkite | Na₂Cu(SO₄)₂·2H₂O | — | — |
| Ktenasite | (Cu,Zn)₅(SO₄)₂(OH)₆·6H₂O | — | — |
| Kudriavite | (Cd,Pb)Bi₂S₄ | — | — |
| Kukharenkoite-(Ce) | Ba₂Ce(CO₃)₃F | — | 4.54 g/cm³ |
| Kukharenkoite-(La) | Ba₂(La,Ce,Th)(CO₃)₃F | — | — |
| Kulanite | Ba(Fe²⁺,Mn²⁺,Mg)₂(Al,Fe³⁺)₂(PO₄)₃(OH)₃ | — | — |
| Kumtyubeite | Ca₅(SiO₄)₂F₂ | — | — |
| Kunatite | CuFe³⁺₂(PO₄)₂(OH)₂·4H₂O | — | — |
| Kupčíkite | Cu₃.₄Fe₀.₆Bi₅S₁₀ | — | — |
| Kushiroite | CaAlAlSiO₆ | — | — |
| Kyawthuite | Bi³⁺Sb₅+O₄ | — | — |
| Kyrgyzstanite | ZnAl₄(SO₄)(OH)₁₂*₃H₂O | — | — |
| Kyzylkumite | V³⁺Ti₂O₅(OH) | — | — |
| Laachite | (Ca,Mn)₂Zr₂Nb₂TiFeO₁₄ | — | — |
| Lacroixite | NaAl(PO₄)F | — | — |
| Laffittite | AgHgAsS₃ | — | 5.84 g/cm³ |
| Laflammeite | Pd₃Pb₂S₂ | — | — |
| Lagalyite | Ca₂xMn₁-xO₂*₁.₅-₂H₂O | — | — |
| Laihunite | Fe²⁺Fe³⁺₂(SiO₄)₂ | 6.0 | — |
| Lammerite | Cu₃(AsO₄)₂ | — | 5.25 g/cm³ |
| Lamprophyllite | (SrNa)Ti₂Na₃Ti(Si₂O₇)₂O₂(OH)₂ | — | — |
| Lanarkite | Pb₂O(SO₄) | — | 6.98 g/cm³ |
| Langite | Cu₄SO₄(OH)₆·2H₂O | — | — |
| Lansfordite | MgCO₃·5H₂O | — | — |
| Lapeyreite | Cu₃O[AsO₃(OH)]₂·H₂O | — | — |
| Laphamite | As₂(Se,S)₃ | 1.5 | — |
| Larderellite | NH₄B₅O₇(OH)₂·H₂O | — | — |
| Larnite | Ca₂SiO₄ | 6.0 | 2.96 g/cm³ |
| Lasalite | Na₂Mg₂V₁₀O₂₈·20H₂O | 1.0 | — |
| Laumontite | CaAl₂Si₄O₁₂·4H₂O | — | — |
| Launayite | CuPb₁₀(Sb,As)₁₂S₂₀ | — | — |
| Lauraniite | — | — | — |
| Lausenite | Fe₂(SO₄)₃*₅H₂O | — | — |
| Lautarite | Ca(IO₃)₂ | — | 4.60 g/cm³ |
| Lautenthalite | PbCu₄(SO₄)₂(OH)₆ * 3H₂O | — | — |
| Lavendulan | NaCaCu₅(AsO₄)₄Cl·5H₂O | 2.8 | 3.54 g/cm³ |
| Lavrentievite | Hg²⁺₃S₂(Cl,Br)₂ | — | — |
| Lawsonbauerite | (Mn²⁺,Mg)₉Zn₄(SO₄)₂(OH)₂₂ * 8H₂O | — | — |
| Lazaraskeite | Cu(C₂H₃O₃)₂ | — | — |
| Lazaridisite | Cd₃(SO₄)₃·8H₂O | — | — |
| Lazerckerite | Ag₃.₇₅Pb₄.₅₀(Sb₇.₇₅Bi₄)S₂₄ | — | — |
| Lazulite | MgAl₂(PO₄)₂(OH)₂ | — | — |
| Leadhillite | Pb₄(SO₄)(CO₃)₂(OH)₂ | — | — |
| Lednevite | Cu[PO₃(OH)]·H₂O | — | — |
| Legrandite | Zn₂AsO₄(OH)·H₂O | — | — |
| Leguernite | Bi₁₂.₆₇O₁₄(SO₄)₅ | — | — |
| Lehmannite | — | — | — |
| Leiteite | ZnAs³⁺₂O₄ | — | — |
| Lemoynite | (Na,K)₂CaZr₂Si₁₀O₂₆ * 5H₂O | — | — |
| Leogangite | Cu₁₀(AsO₄)₄(SO₄)(OH)₆ * 8H₂O | — | — |
| Letnikovite-(Ce) | (Na◻)Ca₂Ce₂[Si₇O₁₇(OH)]F₄(H₂O)₄ | — | — |
| Leucophoenicite | Mn²⁺₇(SiO₄)₃(OH)₂ | — | — |
| Leucosphenite | BaNa₄Ti₂B₂Si₁₀O₃₀ | — | — |
| Levantite | KCa₃Al₂(SiO₄)(Si₂O₇)(PO₄) | — | — |
| Levinsonite-(Y) | YAl(SO₄)₂(C₂O₄)·12H₂O | — | 2.18 g/cm³ |
| Leybovite-K | KCuNa(MgFe³⁺)(AsO₄)₃ | — | — |
| Leydetite | Fe(UO₂)(SO₄)₂·11H₂O | — | — |
| Leószilárdite | — | — | — |
| Lianbinite | (NH₄)(C₂H₃O₃)(C₂H₄O₃) | — | — |
| Liberite | Li₂BeSiO₄ | 7.0 | 2.74 g/cm³ |
| Liebauite | Ca₃Cu₅Si₉O₂₆ | — | — |
| Liguowuite | WO₃ | — | — |
| Lileyite | Ba₂Ti₂Na₂Fe²⁺Mg(Si₂O₇)₂O₂F₂ | — | — |
| Limousinite | — | — | — |
| Linarite | PbCuSO₄(OH)₂ | 2.5 | — |
| Lindbergite | MnC₂O₄·2H₂O | 2.5 | 2.10 g/cm³ |
| Lindgrenite | Cu₃(MoO₄)₂(OH)₂ | 4.5 | — |
| Liroconite | Cu₂AlAsO₄(OH)₄·4H₂O | — | — |
| Liskeardite | [(Al,Fe)₃₂(AsO₄)₁₈(OH)₄₂(H₂O)₂₂] * 5₂H₂O | — | — |
| Lislkirchnerite | Pb₆Al(OH)₈Cl₂(NO₃)₅*₂H₂O | — | — |
| Lithosite | K₃Al₂Si₄O₁₂(OH) | — | — |
| Litochlebite | Ag₂PbBi₄Se₈ | — | — |
| Litvinskite | Na₂(☐,Na,Mn)ZrSi₆O₁₂(OH,O)₆ | — | — |
| Livingstonite | HgSb₄S₆(S₂) | — | 4.79 g/cm³ |
| Lizardite | Mg₃Si₂O₅(OH)₄ | 2.5 | 2.49 g/cm³ |
| Lombardoite | Ba₂Mn³⁺(AsO₄)₂(OH) | — | — |
| Longshoushanite-(Ce) | Ce₄MgAl₂Ti₂(Si₂O₇)₂O₈ | — | — |
| Lopatkaite | Pb₅Sb₃AsS₁₁ | — | — |
| Lorándite | TlAsS₂ | — | 5.26 g/cm³ |