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Cubic crystal system
494 minerals
| Mineral | Chemical formula | Mohs hardness | Density |
|---|---|---|---|
| Krutovite | NiAs₂ | 5.5 | 7.11 g/cm³ |
| Kullerudite | NiSe₂ | — | 6.57 g/cm³ |
| Kutinaite | Ag₆Cu₁₄As₇ | 4.5 | 8.39 g/cm³ |
| Kuznetsovite | (Hg+₂)Hg²⁺(AsO₄)Cl | — | — |
| Kvačekite | NiSbSe | — | 7.59 g/cm³ |
| Lafossaite | Tl(Cl,Br) | — | — |
| Langbeinite | K₂Mg₂(SO₄)₃ | — | 2.84 g/cm³ |
| Laurite | RuS₂ | — | 6.15 g/cm³ |
| Lazurite | Na[(AlSiO4)SO4] | 5.5 | — |
| Lead | Pb | — | — |
| Lime (mineral) | CaO | — | 3.35 g/cm³ |
| Linnaeite | Co₃S₄ | — | 4.77 g/cm³ |
| Londonite | CsBe₅Al₄B₁₁O₂₈ | — | — |
| Maghemite | (Fe³⁺₀.₆₇☐₀.₃₃)Fe³⁺₂O₄ | 6.0 | — |
| Magnesiochromite | MgCr³⁺₂O₄ | 5.5 | — |
| Magnesiocoulsonite | MgV₂O₄ | — | — |
| Magnesioferrite | MgFe³⁺₂O₄ | — | — |
| Magnesiovoltaite | K₂Mg₅Fe³⁺₃Al(SO₄)₁₂*₁₈H₂O | — | — |
| Magnetite | Fe²⁺Fe³⁺₂O₄ | 6.0 | 5.17 g/cm³ |
| Majorite | Mg₃(Fe²⁺,Si,Al)₂(SiO₄)₃ | 7.5 | — |
| Malanite | Cu(Pt³⁺,Ir³⁺)₂S₄ | 5.0 | — |
| Maldonite | Au₂Bi | — | — |
| Manganberzeliite | (NaCa₂)Mn²⁺₂(AsO₄)₃ | — | — |
| Manganochromite | Mn²⁺Cr₂O₄ | — | — |
| Manganolangbeinite | K₂Mn²⁺₂(SO₄)₃ | — | — |
| Manganosite | Mn²⁺O | — | — |
| Manganotychite | Na₆Mn²⁺₂(CO₃)₄(SO₄) | — | — |
| Marshite | CuI | 2.5 | — |
| Maslovite | PtBiTe | — | 11.63 g/cm³ |
| Mayingite | IrBiTe | — | — |
| Mcalpineite | Cu₃(Te⁶⁺O₆) | — | — |
| Meierite | Ba₄₄Si₆₆Al₃₀O₁₉₂Cl₂₅(OH)₃₃ | — | — |
| Melliniite | (Ni,Fe)₄P | — | — |
| Mendeleevite-(Ce) | Cs₆(REE₂₂Ca₆)(Si₇₀O₁₇₅)(OH,F)₁₄(H₂O)₂₁ | — | — |
| Mendeleevite-(Nd) | Cs₆[(Nd,REE)₂₃Ca₇](Si₇₀O₁₇₅)(OH,F)₁₉(H₂O)₁₆ | — | — |
| Menezesite | Ba₂MgZr₄(BaNb₁₂O₄₂) * ₁₂H₂O | — | — |
| Meniaylovite | Ca₄AlSi(SO₄)F₁₃·12H₂O | — | — |
| Menzerite-(Y) | (CaY₂)Mg₂(SiO₄)₃ | — | — |
| Metaborite | HBO₂ | — | 2.10 g/cm³ |
| Metacinnabar | HgS | 3.0 | 7.38 g/cm³ |
| Mgriite | Cu₃AsSe₃ | — | — |
| Miassite | Rh₁₇S₁₅ | — | 7.53 g/cm³ |
| Michenerite | PdBiTe | — | 9.68 g/cm³ |
| Michitoshiite-(Cu) | — | — | — |
| Midbarite | Ca₃Mg₂(V₂Si)O₁₂ | — | — |
| Miersite | (Ag,Cu)I | — | — |
| Miessiite | Pd₁₁Te₂Se₂ | — | — |
| Milotaite | PdSbSe | 4.5 | 8.09 g/cm³ |
| Momoiite | (Mn²⁺,Ca)₃V³⁺₂(SiO₄)₃ | 6.5 | — |
| Monteneveite | Ca₃Sb₅+₂(Fe³⁺₂Fe²⁺)O₁₂ | — | — |
| Monteponite | CdO | 3.0 | 8.10 g/cm³ |
| Morimotoite | Ca₃(Ti,Fe²⁺,Fe³⁺)₂((Si,Fe³⁺)O₄)₃ | 7.5 | — |
| Moschellandsbergite | Ag₂Hg₃ | — | — |
| Mosesite | (Hg₂N)Cl | — | — |
| Murataite-(Y) | (Y,Na)₆Zn(Zn,Fe³⁺)₄(Ti,Nb,Na)₁₂O₂₉(O,F,OH)₁₀F₄ | — | — |
| Mushistonite | (Cu,Zn,Fe²⁺)[Sn(OH)₆] | — | — |
| Nabaphite | NaBaPO₄ * 9H₂O | — | — |
| Nabiasite | BaMn²⁺₉(VO₄,AsO₄)₆(OH)₂ | — | — |
| Nantokite | CuCl | 2.5 | — |
| Naquite | FeSi | — | 6.53 g/cm³ |
| Native copper | Cu | 2.8 | 8.50 g/cm³ |
| Native gold | Au | 2.8 | 17.40 g/cm³ |
| Native silicon | Si | — | — |
| Native silver | Ag | 2.8 | 10.50 g/cm³ |
| Natropharmacoalumite | NaAl₄(AsO₄)₃(OH)₄·4H₂O | — | — |
| Natropharmacosiderite | (Na,K)Fe³⁺₄(AsO₄)₃(OH)₄ * 6-₇H₂O | — | — |
| Natrophosphate | Na₇(PO₄)₂F * 19H₂O | — | — |
| Negevite | NiP₂ | — | 4.98 g/cm³ |
| Nickel (native) | Ni | — | — |
| Nickelskutterudite | (Ni,Co,Fe)As₃ | — | — |
| Nickeltyrrellite | CuNi₂Se₄ | — | — |
| Nielsenite | PdCu₃ | — | 9.97 g/cm³ |
| Niningerite | MgS | — | 2.65 g/cm³ |
| Niobocarbide | (Nb,Ta)C | — | — |
| Nisnite | Ni₃Sn | — | 9.75 g/cm³ |
| Nitrobarite | Ba(NO₃)₂ | — | 3.20 g/cm³ |
| Northupite | Na₃Mg(CO₃)₂Cl | — | — |
| Nosean | Na₈(Si₆Al₆)O₂₄(SO₄)·H₂O | 5.5 | — |
| Noyesite | Sb₂Te₃(S,OH)₄(PS,OH)₃ | — | — |
| Oberthürite | — | — | — |