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Minerals
6,131 minerals
| Mineral | Chemical formula | Crystal system | Mohs hardness | Density |
|---|---|---|---|---|
| Kopylovite | K₂Ti(Si₃O₉) | Hexagonal | — | — |
| Koragoite | (Mn²⁺,Fe³⁺)₃(Nb,Ta,Ti)₂(Nb,Mn)₂(W,Ta)₂O₂₀ | Monoclinic | — | — |
| Koritnigite | Zn(AsO₃OH)·H₂O | — | — | — |
| Kornelite | Fe₂(SO₄)₃ * 7H₂O | Monoclinic | — | — |
| Kornerupine | Mg₃Al₆(Si,Al,B)₅O₂₁(OH) | Orthorhombic | — | — |
| Korobitsynite | (Na,☐)₄Ti₂(Si₄O₁₂)(O,OH)₂·4H₂O | — | — | — |
| Korshunovskite | Mg₂Cl(OH)₃·4H₂O | Triclinic | — | — |
| Koryakite | NaKMg₂Al₂(SO₄)₆ | Trigonal | — | — |
| Korzhinskite | Ca(B₂O₄) * H₂O | Monoclinic | — | — |
| Kosmochlor | NaCrSi₂O₆ | Monoclinic | 6.0 | 3.60 g/cm³ |
| Kosnarite | KZr₂(PO₄)₃ | Trigonal | 4.5 | 3.06 g/cm³ |
| Kostovite | AuCuTe₄ | — | — | — |
| Kostylevite | K₂Zr(Si₃O₉) * H₂O | Monoclinic | — | — |
| Kotoite | Mg₃(BO₃)₂ | Orthorhombic | 6.5 | 3.11 g/cm³ |
| Kottenheimite | Ca₃Si(SO₄)₂(OH)₆·12H₂O | Hexagonal | — | — |
| Kotulskite | Pd(Te,Bi) | — | — | — |
| Koutekite | Cu₅As₂ | Hexagonal | — | — |
| Kovdorskite | Mg₂PO₄(OH)·3H₂O | — | — | — |
| Kozoite-(La) | (La,Nd)(CO₃)(OH) | Orthorhombic | — | — |
| Kozoite-(Nd) | (Nd,La,Sm,Pr)(CO₃)(OH) | Orthorhombic | — | — |
| Kozyrevskite | Cu₄O(AsO₄)₂ | Orthorhombic | — | — |
| Kraisslite | Zn₃(Mn,Mg)₂₅(Fe³⁺,Al)(As³⁺O₃)₂[(Si,As₅+)O₄]₁₀(OH)₁₆ | — | — | — |
| Krasheninnikovite | KNa₂CaMg(SO₄)₃F | Hexagonal | — | — |
| Krasnoshteinite | Al₈[B₂O₄(OH)₂](OH)₁₆Cl₄*₇H₂O | — | — | — |
| Krasnovite | Ba(Al,Mg)(PO₄,CO₃)(OH)₂ * H₂O | Orthorhombic | — | — |
| Kratochvílite | C₁₃H₁₀ | Orthorhombic | — | — |
| Krausite | KFe(SO₄)₂ * H₂O | Monoclinic | — | — |
| Krauskopfite | BaSi₂O₅ * 3H₂O | — | — | — |
| Krautite | Mn(AsO₃OH)·H₂O | — | — | — |
| Kravtsovite | PdAg₂S | Orthorhombic | — | — |
| Kreiterite | CsLi₂Fe³⁺(Si₄O₁₀)F₂ | Monoclinic | — | — |
| Kremersite | (NH₄)₂Fe³⁺Cl₅·H₂O | — | — | — |
| Krennerite | Au₃AgTe₈ | Orthorhombic | — | — |
| Krettnichite | PbMn³⁺₂(VO₄)₂(OH)₂ | Monoclinic | — | — |
| Kribergite | Al₅(PO₄)₃(SO₄)(OH)₄ * 4H₂O | Triclinic | — | — |
| Krieselite | Al₂(GeO₄)F₂ | Orthorhombic | — | 4.02 g/cm³ |
| Krinovite | Na₂Mg₄Cr³⁺₂(Si₆O₁₈)O₂ | — | — | — |
| Kristekite | Cu₂(H₂O)₄(UO₂)(SeO₃)₃·4H₂O | Monoclinic | — | — |
| Kristiansenite | Ca₂ScSn(Si₂O₇)(Si₂O₆OH) | Triclinic | — | — |
| Kristjánite | KNa₂H(SO₄)₂ | Monoclinic | — | — |
| Krivovichevite | Pb₃Al(OH)₆SO₄(OH) | Trigonal | 3.0 | — |
| Krotite | CaAl₂O₄ | Monoclinic | 6.5 | — |
| Kroupaite | KPb₀.₅[(UO₂)₈O₄(OH)₁₀]*₁₀H₂O | Orthorhombic | — | — |
| Kruijenite | Ca₄Al₄(SO₄)F₂(OH)₁₆*₂H₂O | Tetragonal | 3.0 | — |
| Krupičkaite | — | Monoclinic | — | — |
| Krupkaite | PbCuBi₃S₆ | Orthorhombic | 4.0 | — |
| Krut'aite | CuSe₂ | Orthorhombic | 4.0 | 6.28 g/cm³ |
| Krutovite | NiAs₂ | Cubic | 5.5 | 7.11 g/cm³ |
| Kryachkoite | (Al,Cu)₆(Fe,Cu) | Orthorhombic | — | — |
| Kryzaite | Na₄(MgCr)(PO₄)₃ | Trigonal | — | — |
| Kryzhanovskite | (Fe³⁺,Mn²⁺)₃(PO₄)₂(OH,H₂O)₃ | — | — | — |
| Králíkite | BaCl₂·2H₂O | Monoclinic | — | — |
| Krásnoite | Ca₃Al₇.₇Si₃P₄O₂₂.₉(OH)₁₃.₃F₂·8H₂O | Trigonal | — | — |
| Kröhnkite | Na₂Cu(SO₄)₂·2H₂O | Monoclinic | — | — |
| Ktenasite | (Cu,Zn)₅(SO₄)₂(OH)₆·6H₂O | Monoclinic | — | — |
| Kuannersuite-(Ce) | NaCeBa₃(PO₄)₃F₀.₅Cl₀.₅ | — | — | — |
| Kudriavite | (Cd,Pb)Bi₂S₄ | Monoclinic | — | — |
| Kudryavtsevaite | Na₃MgFe³⁺Ti₄O₁₂ | Orthorhombic | — | — |
| Kufahrite | PtPb | Hexagonal | — | 14.91 g/cm³ |
| Kukharenkoite-(Ce) | Ba₂Ce(CO₃)₃F | Monoclinic | — | 4.54 g/cm³ |
| Kukharenkoite-(La) | Ba₂(La,Ce,Th)(CO₃)₃F | Monoclinic | — | — |
| Kukisvumite | Na₆ZnTi₄(Si₈O₂₄)O₄ * 4H₂O | — | — | — |
| Kuksite | Pb₃Zn₃(PO₄)₂(TeO₆) | Trigonal | — | 6.16 g/cm³ |
| Kulanite | Ba(Fe²⁺,Mn²⁺,Mg)₂(Al,Fe³⁺)₂(PO₄)₃(OH)₃ | Monoclinic | — | — |
| Kuliginite | Fe₃Mg(OH)₆Cl₂ | Trigonal | — | — |
| Kuliokite-(Y) | Y₄Al(SiO₄)₂(OH)₂F₅ | Triclinic | — | — |
| Kulkeite | Mg₈Al(AlSi₇O₂₀)(OH)₁₀ | — | — | — |
| Kullerudite | NiSe₂ | Cubic | — | 6.57 g/cm³ |
| Kumdykolite | Na(AlSi₃O₈) | Orthorhombic | — | 2.64 g/cm³ |
| Kummerite | Mn²⁺Fe³⁺Al(PO₄)₂(OH)₂·8H₂O | Triclinic | — | — |
| Kumtyubeite | Ca₅(SiO₄)₂F₂ | Monoclinic | — | — |
| Kunatite | CuFe³⁺₂(PO₄)₂(OH)₂·4H₂O | Monoclinic | — | — |
| Kupletskite | (K,Na)₃(Mn,Fe)₇Ti₂Si₈O₂₆(OH)₄F | — | — | — |
| Kupletskite-(Cs) | Cs₂NaMn²⁺₇Ti₂(Si₄O₁₂)₂O₂(OH)₄F | — | — | — |
| Kupčíkite | Cu₃.₄Fe₀.₆Bi₅S₁₀ | Monoclinic | — | — |
| Kuramite | Cu₃SnS₄ | — | 4.5 | — |
| Kuranakhite | PbMn⁴⁺Te⁶⁺O₆ | Orthorhombic | — | — |
| Kuratite | Ca₂(Fe²⁺₅Ti)O₂[Si₄Al₂O₁₈] | Triclinic | — | — |
| Kurchatovite | Ca(Mg,Mn²⁺)[B₂O₅] | Orthorhombic | — | — |
| Kurgantaite | CaSr[B₅O₉]Cl·H₂O | Triclinic | — | — |