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- Hexagonal
Hexagonal crystal system
403 minerals
| Mineral | Chemical formula | Mohs hardness | Density |
|---|---|---|---|
| Mimetite | Pb₅(AsO₄)₃Cl | — | 6.86 g/cm³ |
| Mineevite-(Y) | Na₂₅Ba(Y,Gd,Dy)₂(CO₃)₁₁(HCO₃)₄(SO₄)₂F₂Cl | — | — |
| Minjiangite | Ba[Be₂P₂O₈] | — | — |
| Minohlite | (Cu,Zn)₇(SO₄)₂(OH)₁₀·8H₂O | — | — |
| Mixite | BiCu₆(AsO₄)₃(OH)₆ * 3H₂O | — | — |
| Miyahisaite | (Sr,Ca)₂Ba₃(PO₄)₃F | — | — |
| Moissanite | SiC | 9.2 | 3.23 g/cm³ |
| Molybdenite | MoS₂ | — | 4.67 g/cm³ |
| Molysite | FeCl₃ | — | — |
| Monipite | MoNiP | — | 8.47 g/cm³ |
| Morelandite | Ca₂Ba₃(AsO₄)₃Cl | — | — |
| Nagelschmidtite | Ca₇(SiO₄)₂(PO₄)₂ | — | — |
| Nasonite | Pb₆Ca₄(Si₂O₇)₃Cl₂ | — | — |
| Native zinc | Zn | 2.0 | — |
| Nepheline | Na₃K(Al₄Si₄O₁₆) | — | — |
| Nickeline | NiAs | — | — |
| Niggliite | PtSn | 5.5 | 12.80 g/cm³ |
| Nolanite | V³⁺₈Fe³⁺₂O₁₄(OH)₂ | — | — |
| Northstarite | — | — | — |
| Offretite | KCaMg(Si₁₃Al₅)O₃₆·15H₂O | 4.0 | — |
| Oftedalite | KSc₂☐₂Be₃Si₁₂O₃₀ | 6.0 | — |
| Orcelite | Ni₅-xAs₂, x ~ ₀.₂₅ | — | — |
| Oregonite | Ni₂FeAs₂ | 5.0 | — |
| Orickite | ₂CuFeS₂ * H₂O | — | — |
| Orlymanite | Ca₄Mn²⁺₃Si₈O₂₀(OH)₆·2H₂O | — | — |
| Osmium (native) | Os | — | — |
| Osumilite | (K,Na)(Fe²⁺,Mg)₂(Al,Fe³⁺)₃(Si,Al)₁₂O₃₀ | — | — |
| Osumilite-(Mg) | KMg₂Al₃(Al₂Si₁₀)O₃₀ | 6.5 | — |
| Ottensite | Na₃(Sb₂O₃)₃(SbS₃)·3H₂O | — | 4.14 g/cm³ |
| Pabstite | BaSnSi₃O₉ | — | 3.98 g/cm³ |
| Painite | CaZrAl₉(BO₃)O₁₅ | 8.0 | 4.00 g/cm³ |
| Palarstanide | Pd₅(Sn,As)₂ | — | 10.27 g/cm³ |
| Palladogermanide | Pd₂Ge | — | 10.48 g/cm³ |
| Palladosilicide | Pd₂Si | — | 9.42 g/cm³ |
| Penfieldite | Pb₂Cl₃(OH) | — | — |
| Penzhinite | (Ag,Cu)₄Au(S,Se)₄ | — | — |
| Peprossiite-(Ce) | (Ce,La)(Al₃O)₂/₃B₄O₁₀ | — | — |
| Perlialite | K₉NaCa(Si₂₄Al₁₂)O₇₂·15H₂O | — | — |
| Petersite-(Ce) | Cu₆Ce(PO₄)₃(OH)₆·3H₂O | — | — |
| Petersite-(Y) | (Y,Ce,Nd)Cu₆(PO₄)₃(OH)₆ * 3H₂O | — | — |
| Pfaffenbergite | KNa₃(Al₄Si₁₂)O₃₂ | — | — |
| Pharmazincite | KZn(AsO₄) | — | — |
| Phosphoellenbergerite | (Mg,☐)₂Mg₁₂(PO₄,PO₃OH)₆(PO₃OH,CO₃)₂(OH)₆ | — | — |
| Phosphohedyphane | Ca₂Pb₃(PO₄)₃Cl | 4.0 | — |
| Phyllotungstite | — | — | — |
| Pieczkaite | Mn₅(PO₄)₃Cl | — | — |
| Pitiglianoite | Na₆K₂(Al₆Si₆O₂₄)(SO₄)·2H₂O | — | — |
| Pittongite | (Na,H₂O)₀.₇(W,Fe³⁺)(O,OH)₃ | — | — |
| Plechovite | Ca₂[K(H₂O)]KBe₃Si₁₂O₃₀ | — | — |
| Pliniusite | Ca₅(VO₄)₃F | — | 3.30 g/cm³ |
| Plumboagardite | (Pb,REE,Ca)Cu₆(AsO₄)₃(OH)₆·3H₂O | 3.0 | — |
| Plumbopalladinite | Pd3Pb2 | 5.0 | 8.32 g/cm³ |
| Polekhovskyite | MoNiP₂ | — | 6.73 g/cm³ |
| Polezhaevaite-(Ce) | NaSrCeF₆ | — | — |
| Polkanovite | Rh₁₂As₇ | — | — |
| Poudretteite | KNa₂B₃Si₁₂O₃₀ | 5.0 | — |
| Pseudomertieite | Pd₁₁(Sb,As)₄ | — | — |
| Pseudorutile | Fe₂Ti₃O₉ | 5.5 | — |
| Pyromorphite | Pb₅(PO₄)₃Cl | — | — |
| Pyrrhotite | Fe₇S₈ | 4.0 | — |
| Quadridavyne | [(Na,K)₆Cl₂][Ca₂Cl₂][(Si₆Al₆O₂₄)] | — | — |
| Quintinite | Mg₄Al₂(OH)₁₂(CO₃)·3H₂O | 2.0 | — |
| Qusongite | WC | — | 15.55 g/cm³ |
| Rambergite | MnS | 4.0 | 4.19 g/cm³ |
| Reederite-(Y) | (Na,Mn)₁₅Y₂(CO₃)₉(FSO₃)Cl | — | — |
| Rhabdoborite-(V) | Mg₁₂(V₅+,Mo₆+,W₆+)₁ * 5O₆{[BO₃]₆-x[(P,As)O₄]xF₂-x} (x < ₁) | — | — |
| Rhabdoborite-(W) | Mg₁₂(W₆+,V₅+)₁ * 5O₆{[BO₃]₆–x[(P,As)O₄]xF₂–x} (x < ₁) | — | — |
| Rhabdophane-(La) | La(PO₄)·H₂O | 3.5 | — |
| Rhabdophane-(Nd) | NdPO₄·H₂O | — | — |
| Rhabdophane-(Y) | Y(PO₄)·H₂O | — | — |
| Rhenium (native) | Re | — | — |
| Rinmanite | ZnSb⁵⁺(Fe³⁺₂Mg)O₇(OH) | — | — |
| Roedderite | KNaMg₂(Mg₃Si₁₂)O₃₀ | 6.5 | — |
| Rogermitchellite | Na₆Sr₁₂Ba₂Zr₁₃Si₃₉B₄O₁₂₃(OH)₆·20H₂O | — | — |
| Rudolfhermannite | — | — | — |
| Russoite | (NH₄)ClAs₂O₃(H₂O)₀.₅ | — | — |
| Rutheniridosmine | (Ir,Os,Ru) | — | 20.49 g/cm³ |
| Ruthenium (native) | Ru | — | — |
| Sacrofanite | (Na₆₁K₁₉Ca₃₂)(Si₈₄Al₈₄O₃₃₆)(SO₄)₂₆Cl₂F₆*₂H₂O | — | — |
| Sanrománite | Na₂CaPb₃(CO₃)₅ | 4.0 | — |