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Minerals
6,131 minerals
| Mineral | Chemical formula | Crystal system | Mohs hardness | Density |
|---|---|---|---|---|
| Karenwebberite | NaFe²⁺(PO₄) | Orthorhombic | — | — |
| Karibibite | Fe³⁺₃(As³⁺O₂)₄(As³⁺₂O₅)(OH) | Orthorhombic | — | — |
| Karlite | Mg₇(BO₃)₃(OH,Cl)₅ | Orthorhombic | 5.5 | — |
| Karlleuite | Ca₂MnO₄ | Tetragonal | — | — |
| Karlseifertite | Pb(Ga₂Ge)(AsO₄)₂(OH)₆ | Trigonal | — | — |
| Karnasurtite-(Ce) | (Ce,La,Th)(Ti,Nb)(Al,Fe)(Si₂O₇)(OH)₄ * 3H₂O | Amorphous | — | — |
| Karpenkoite | Co₃(V₂O₇)(OH)₂·2H₂O | Trigonal | — | — |
| Karpinskite | (Mg,Ni)₂Si₂O₅(OH)₂ (?) | — | — | — |
| Karpovite | Tl₂VO(SO₄)₂(H₂O) | Monoclinic | — | — |
| Karupmøllerite-Ca | — | — | — | — |
| Karwowskiite | Ca₉Mg(Fe²⁺₀,₅◻₀,₅)(PO₄)₇ | Trigonal | — | 3.08 g/cm³ |
| Kasatkinite | Ba₂Ca₈B₅Si₈O₃₂(OH)₃·6H₂O | Monoclinic | — | — |
| Kashinite | (Ir,Rh)₂S₃ | — | — | — |
| Kaskasite | (Mo,Nb)S₂·(Mg₁₋ₓAlₓ)(OH)₂₊ₓ | Trigonal | — | — |
| Kasolite | Pb(UO₂)SiO₄·H₂O | Monoclinic | — | — |
| Kassite | CaTi₂O₄(OH)₂ | Monoclinic | 5.0 | 3.23 g/cm³ |
| Kastningite | (Mn²⁺,Fe²⁺,Mg)Al₂(PO₄)₂(OH)₂·8H₂O | — | — | — |
| Katanite | Ba₃NbFe₃Si₂O₁₄ | Trigonal | — | — |
| Katayamalite | KLi₃Ca₇Ti₂(SiO₃)₁₂(OH)₂ | Monoclinic | — | — |
| Katerinopoulosite | (NH₄)₂Zn(SO₄)₂*₆H₂O | Monoclinic | — | — |
| Katiarsite | KTiO(AsO₄) | Orthorhombic | — | 3.30 g/cm³ |
| Katoite | Ca₃Al₂(SiO₄)₃-x(OH)₄x (x = ₁.₅-₃) | Cubic | — | — |
| Katophorite | Na(NaCa)(Mg₄Al)(Si₇Al)O₂₂(OH)₂ | Monoclinic | — | — |
| Katoptrite | (Mn²⁺,Mg)₁₃(Al,Fe³⁺)₄Sb₅+₂(SiO₄)₂O₂₀ | — | — | — |
| Katsarosite | Zn(C₂O₄)⋅2H₂O | Monoclinic | — | — |
| Kawazulite | Bi₂Te₂Se | Trigonal | 1.5 | 7.79 g/cm³ |
| Kayrobertsonite | [MnAl₂(PO₄)₂(OH)₂(H₂O)₄]*₂H₂O | Triclinic | — | — |
| Kayupovaite | Na₂Mn₁₀[(Si₁₄Al₂)O₃₈(OH)₈]·₇H₂O | Monoclinic | — | — |
| Kazakhstanite | Fe³⁺₅V₄+₃V₅+₁₂O₃₉(OH)₉ * 9H₂O | — | — | — |
| Kazakovite | Na₆Mn²⁺Ti(Si₆O₁₈) | Trigonal | — | — |
| Kazanskyite | Ba☐TiNbNa₃Ti(Si₂O₇)₂O₂(OH)₂(H₂O)₂ | Triclinic | — | — |
| Kaznakhtite | — | Trigonal | — | — |
| Kaňkite | — | — | — | — |
| Keatite | SiO₂ | Tetragonal | — | 2.63 g/cm³ |
| Keckite | CaMn(Fe³⁺,Mn)₂Fe³⁺₂(PO₄)₄(OH)₃(H₂O)₇ | Monoclinic | — | — |
| Kegelite | Pb₄Al₂Si₄O₁₀(SO₄)(CO₃)₂(OH)₄ | — | — | — |
| Kegginite | Pb₃Ca₃[AsV₁₂O₄₀(VO)]*₂₀H₂O | Trigonal | — | — |
| Keilite | FeS | Cubic | 4.0 | 4.29 g/cm³ |
| Keithconnite | Pd₂₀Te₇ | Trigonal | — | 10.79 g/cm³ |
| Keiviite-(Y) | Y₂Si₂O₇ | Monoclinic | — | 4.26 g/cm³ |
| Keiviite-(Yb) | Yb₂Si₂O₇ | Monoclinic | — | 6.24 g/cm³ |
| Keldyshite | (Na,H)₂ZrSi₂O₇ | Triclinic | — | — |
| Kellyite | Mn²⁺₂Al(AlSiO₅)(OH)₄ | — | — | — |
| Kelyanite | (Hg+₂)₆Sb³⁺BrCl₂O₆ | Monoclinic | — | — |
| Kemmlitzite | SrAl₃(AsO₄)(SO₄)(OH)₆ | — | 5.5 | — |
| Kempite | Mn²⁺₂Cl(OH)₃ | — | — | — |
| Kenhsuite | Hg²⁺₃S₂Cl₂ | Orthorhombic | — | — |
| Kenngottite | Mn²⁺₃Fe³⁺₄(PO₄)₄(OH)₆(H₂O)₂ | Monoclinic | — | — |
| Kenoargentotennantite-(Fe) | — | Cubic | — | — |
| Kenoargentotetrahedrite-(Fe) | Ag₆(Cu₄Fe₂)Sb₄S₁₂☐ | — | — | — |
| Kenoargentotetrahedrite-(Zn) | [Ag₆]⁴⁺(Cu₄Zn₂)Sb₄S₁₂◻ | Cubic | — | — |
| Kenomicrolite | ◻₂Ta₂[O₄(OH)₂]◻ | Cubic | — | — |
| Kenoplumbomicrolite | (Pb,☐)₂Ta₂O₆(☐,OH,O) | Cubic | — | — |
| Kenotobermorite | Ca₄Si₆O₁₅(OH)₂(H₂O)₂·3H₂O | — | — | — |
| Kentbrooksite | (Na,REE)₁₅(Ca,REE)₆(Mn²⁺,Fe²⁺)₃Zr₃Nb[Si₂₅O₇₄]F₂ * 2H₂O | Trigonal | — | — |
| Kentrolite | Pb₂Mn³⁺₂(Si₂O₇)O₂ | Orthorhombic | — | — |
| Kenyaite | Na₂Si₂₂O₄₁(OH)₈ * 6H₂O | Monoclinic | — | — |
| Keplerite | — | Trigonal | — | — |
| Kerimasite | Ca₃Zr₂(SiFe³⁺₂)O₁₂ | Cubic | 7.0 | — |
| Kermesite | Sb₂OS₂ | Triclinic | — | 4.68 g/cm³ |
| Kernite | Na₂B₄O₆(OH)₂·3H₂O | Monoclinic | — | — |
| Kernowite | — | Monoclinic | — | — |
| Kesebolite-(Ce) | — | Monoclinic | — | — |
| Kettnerite | CaBiCO₃OF | Orthorhombic | — | — |
| Keutschite | Cu₂AgAsS₄ | Tetragonal | — | — |
| Keyite | Cu²⁺₃Zn₄Cd₂(AsO₄)₆ * 2H₂O | — | — | — |
| Keystoneite | Mg₀.₅NiFe³⁺(Te⁴⁺O₃)₃·4.5H₂O | — | — | — |
| Khademite | AlSO₄F·5H₂O | — | — | — |
| Khaidarkanite | Cu₄Al₃(OH)₁₄F₃·2H₂O | Monoclinic | — | — |
| Khamrabaevite | TiC | Cubic | 9.0 | 4.89 g/cm³ |
| Khanneshite | (Na,Ca)₃(Ba,Sr,Ce,Ca)₃(CO₃)₅ | Hexagonal | — | — |
| Kharaelakhite | (Cu,Pt,Pb,Fe,Ni)₉S₈ | Orthorhombic | — | — |
| Khatyrkite | (Cu,Zn)Al₂ | Tetragonal | — | — |
| Khesinite | Ca₄(Mg₃Fe³⁺₉)O₄(Fe³⁺₉Si₃)O₃₆ | Triclinic | — | — |
| Khibinskite | K₂ZrSi₂O₇ | Monoclinic | — | 3.19 g/cm³ |
| Khinite | Pb²⁺Cu²⁺₃[Te₆+O₆](OH)₂ | Orthorhombic | — | — |
| Khmaralite | (Mg,Al,Fe)₁₆[(Al,Si,Be)₁₂O₃₆]O₄ | — | — | — |
| Khomyakovite | Na₁₂Sr₃Ca₆Fe₃Zr₃W[Si₂₅O₇₃](O,OH,H₂O)₃(OH,Cl)₂ | Trigonal | — | — |
| Khorixasite | (Bi₀.₆₇☐₀.₃₃)Cu(VO₄)(OH) | Monoclinic | — | — |
| Khrenovite | Na₃Fe³⁺₂(AsO₄)₃ | Monoclinic | — | — |