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Hexagonal crystal system
403 minerals
| Mineral | Chemical formula | Mohs hardness | Density |
|---|---|---|---|
| Currierite | Na₄Ca₃MgAl₄(AsO₃OH)₁₂·9H₂O | — | — |
| Cuzticite | Fe³⁺₂Te⁶⁺O₆·3H₂O | — | — |
| Davidsmithite | (Ca,☐)₂Na₆Al₈Si₈O₃₂ | — | — |
| Davyne | (Na,Ca,K)₈(Si,Al)₁₂O₂₄(Cl,SO₄,CO₃)₂₋₃ | — | — |
| Demartinite | K₂SiF₆ | 3.0 | 2.98 g/cm³ |
| Depmeierite | Na₈(Al₆Si₆O₂₄)(PO₄,CO₃)₁-x * 3H₂O (x<₀.₅) | — | — |
| Despujolsite | Ca₃Mn⁴⁺(SO₄)₂(OH)₆·3H₂O | 2.5 | — |
| Diaoyudaoite | NaAl₁₁O₁₇ | — | 3.22 g/cm³ |
| Dmisteinbergite | Ca(Al₂Si₂O₈) | — | — |
| Donwilhelmsite | CaAl₄Si₂O₁₁ | — | — |
| Driekopite | PtBi | — | 14.58 g/cm³ |
| Dualite | Na₃₀(Ca,Na,Ce,Sr)₁₂(Na,Mn,Fe,Ti)₆Zr₃Ti₃Mn[Si₅₁O₁₄₄](OH,H₂O,Cl)₉ | 5.0 | — |
| Ebnerite | (NH₄)Zn(PO₄) | — | 2.67 g/cm³ |
| Edgarite | FeNb₃S₆ | — | 5.12 g/cm³ |
| Ekaterinite | Ca₂(B₄O₇)(Cl,OH)₂ * 2H₂O | — | — |
| Ekatite | (Fe³⁺,Fe²⁺,Zn)₁₂(AsO₃)₆(AsO₃,HSiO₄)₂(OH)₆ | 3.0 | 4.06 g/cm³ |
| Engelhauptite | KCu₃(V₂O₇)(OH)₂Cl | — | — |
| Erionite-Ca | Ca₅[Si₂₆Al₁₀O₇₂]·30H₂O | — | — |
| Erionite-K | K₁₀[Al₂₆Si₁₀O₇₂]·30H₂O | — | — |
| Erionite-Na | Na₁₀[Al₂₆Si₁₀O₇₂]·30H₂O | — | — |
| Ermakovite | (NH₄)(As₂O₃)₂Br | — | — |
| Ewaldite | Ba(Na,Ca,Y,Ce,K)(CO₃)₂·2.6H₂O | — | — |
| Faheyite | Be₂Mn²⁺Fe³⁺₂(PO₄)₄·6H₂O | — | — |
| Fairchildite | K₂Ca(CO₃)₂ | 2.5 | 2.63 g/cm³ |
| Farneseite | (Na,Ca,K)₅₆(Al₆Si₆O₂₄)₇(SO₄)₁₂·6H₂O | — | — |
| Feroxyhyte | Fe³⁺O(OH) | — | — |
| Ferrohögbomite-2N2S | [(Fe²⁺,Mg,Zn,Al)₃(Al,Ti,Fe³⁺)₈O₁₅(OH)]₂ | — | — |
| Ferroindialite | (Fe²⁺,Mg)₂Al₄Si₅O₁₈ | — | — |
| Ferrotaaffeite-2N'2S | (Fe²⁺,Mg,Zn)₃Al₈BeO₁₆ | — | — |
| Flamite | (Ca,Na,K)₂(Si,P)O₄ | — | — |
| Fleischerite | Pb₃Ge(SO₄)₂(OH)₆·3H₂O | — | — |
| Fluoborite | Mg₃(BO₃)(F,OH)₃ | — | — |
| Fluocerite-(Ce) | CeF₃ | — | 6.24 g/cm³ |
| Fluoralforsite | Ba₅(PO₄)₃F | — | — |
| Fluorapatite | Ca₅(PO₄)₃F | 5.0 | 3.21 g/cm³ |
| Fluorbritholite-(La) | Ca₂La₃(SiO₄)₃F | — | — |
| Fluorbritholite-(Nd) | Ca₂Nd₃(SiO₄)₃F | — | — |
| Fluorbritholite-(Y) | (Y,Ca)₅(SiO₄)₃F | — | — |
| Fluorcalciobritholite | (Ca,REE)₅(SiO₄,PO₄)₃F | — | — |
| Fluorphosphohedyphane | Ca₂Pb₃(PO₄)₃F | — | — |
| Fluorpyromorphite | Pb₅(PO₄)₃F | — | 6.82 g/cm³ |
| Fluorsigaiite | Ca₂Sr₃(PO₄)₃F | — | — |
| Franciscanite | Mn²⁺₆(V₅+,☐)₂(SiO₄)₂(O,OH)₆ | — | — |
| Freboldite | CoSe | — | — |
| Friedrichbeckeite | K(☐Na)Mg₂(Be₂Mg)Si₁₂O₃₀ | 6.0 | 2.69 g/cm³ |
| Friisite | Pb₈Al₃Si₈O₂₇Cl₃ | — | — |
| Gagarinite-(Y) | NaCaYF₆ | — | — |
| Gajardoite | KCa₀.₅As³⁺₄O₆Cl₂(H₂O)₃·2H₂O | — | — |
| Gajardoite-(NH₄) | (NH₄)As³⁺₄O₆Cl₂(Ca₀,₅◻₀,₅)(H₂O)₅ | — | — |
| Ganomalite | Pb₉Ca₅Mn(Si₂O₇)₄(SiO₄)O | — | — |
| Garutiite | (Ni,Fe,Ir) | 6.0 | — |
| Gaudefroyite | — | 6.0 | — |
| Gengenbachite | KFe₃(H₂PO₄)₂(HPO₄)₄·6H₂O | — | — |
| Genplesite | Ca₃Sn(SO₄)₂(OH)₆·3H₂O | — | — |
| Glaucocerinite | (Zn₁-xAlx)(OH)₂(SO₄)x/₂ * nH₂O | 1.0 | — |
| Gmelinite-Ca | Ca₂(Si₈Al₄)O₂₄·11H₂O | — | — |
| Gmelinite-K | K₄(Si₈Al₄)O₂₄·11H₂O | — | — |
| Gmelinite-Na | Na₄(Si₈Al₄)O₂₄·11H₂O | — | — |
| Gorerite | — | — | — |
| Goudeyite | — | — | — |
| Graphite | C | 1.5 | 2.16 g/cm³ |
| Grayite | (Th,Pb,Ca)(PO₄)·H₂O | — | — |
| Greenockite | CdS | — | 4.70 g/cm³ |
| Gregoryite | Na₂(CO₃) | 3.0 | 2.65 g/cm³ |
| Grimselite | K₃Na(UO₂)(CO₃)₃·H₂O | — | — |
| Grootfonteinite | Pb₃O(CO₃)₂ | — | — |
| Guarinoite | Zn₆(SO₄)(OH)₁₀·5H₂O | — | — |
| Guidottiite | MnFe³⁺₂(SiFe³⁺)O₅(OH)₄ | — | — |
| Haapalaite | (Fe²⁺,Ni)₂(Mg,Fe²⁺)₁.₆₁S₂(OH)₃.₂₂ | — | — |
| Halamishite | Ni₅P₄ | — | — |
| Hanksite | KNa₂₂(SO₄)₉(CO₃)₂Cl | — | — |
| Hauckite | Fe³⁺₃(Mg,Mn²⁺)₂₄Zn₁₈(SO₄)₄(CO₃)₂(OH)₈₁ | — | — |
| Hedyphane | Ca₂Pb₃(AsO₄)₃Cl | 3.5 | 5.70 g/cm³ |
| Heterogenite | Co³⁺O(OH) | — | — |
| Hexacelsian | BaAl₂Si₂O₈ | — | 3.34 g/cm³ |
| Hexaferrum | (Fe,Os,Ru,Ir) | — | — |
| Hexamolybdenum | (Mo,Ru,Fe,Ir,Os) | — | — |
| Hexathioplumbite | — | — | — |
| Hielscherite | Ca₆Si₂[(SO₄)₂(SO₃)₂(OH)₁₂]·22H₂O | — | — |
| Hydrohonessite | (Ni₁-xFe³⁺x)(OH)₂(SO₄)x/₂ * nH₂O | — | — |