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- Hexagonal
Hexagonal crystal system
403 minerals
| Mineral | Chemical formula | Mohs hardness | Density |
|---|---|---|---|
| Santanaite | Pb₁₁(CrO₄)O₁₂ | — | — |
| Scarbroite | Al₅(CO₃)(OH)₁₃·5H₂O | — | — |
| Schachnerite | Ag₁.₁Hg₀.₉ | 3.5 | — |
| Schaurteite | Ca₃Ge(SO₄)₂(OH)₆ * 4H₂O | — | — |
| Sederholmite | NiSe | — | 7.24 g/cm³ |
| Shagamite | KFe₁₁O₁₇ | — | — |
| Siderazot | Fe₅N₂ | — | — |
| Sobolevskite | Pd(Bi,Te) | 4.0 | — |
| Sogdianite | KZr₂(Li₃Si₁₂)O₃₀ | 7.0 | 2.65 g/cm³ |
| Sorosite | Cu₁+x(Sn,Sb) | — | — |
| Stannopalladinite | Pd₃Sn₂ | — | — |
| Stibiopalladinite | Pd₅Sb₂ | — | — |
| Stoppaniite | Be₃Fe³⁺₂(Si₆O₁₈) * H₂O | — | — |
| Strandite | Pb₃Mn³⁺₄Mn⁴⁺₃O₁₅ | — | — |
| Stronadelphite | Sr₅(PO₄)₃F | — | 3.99 g/cm³ |
| Stumpflite | PtSb | 5.0 | — |
| Stützite | — | — | — |
| Sudburyite | PdSb | — | 9.18 g/cm³ |
| Sugilite | K(Na,☐)₂Li₃(Fe,Mn,Al,Zr)₂[Si₁₂O₃₀] | — | — |
| Svabite | Ca₅(AsO₄)₃F | — | 3.59 g/cm³ |
| Swedenborgite | NaBe₄Sb⁵⁺O₇ | — | — |
| Synchysite-(Y) | CaY(CO₃)₂F | — | — |
| Szymańskiite | — | — | — |
| Talc | — | 1.0 | 2.75 g/cm³ |
| Tatarinovite | Ca₃Al(SO₄)[B(OH)₄](OH)₆·12H₂O | — | — |
| Thaumasite | Ca₃Si(OH)₆(SO₄)(CO₃)·12H₂O | 3.5 | — |
| Thorbastnäsite | ThCa(CO₃)₂F₂·3H₂O | — | — |
| Thérèsemagnanite | — | — | — |
| Tienshanite | KNa₃Na₆Ca₂Ba₆Mn₆(Ti₄+,Nb)₆B₁₂Si₃₆O₁₁₄(O,OH,F)₁₁ | — | — |
| Tiptopite | K₂(Li,Na,Ca)₆(Be₆P₆)O₂₄(OH)₂·1.3H₂O | 3.5 | — |
| Titanium (native) | Ti | — | — |
| Tomiolloite | — | — | — |
| Tounkite | (Na,Ca,K)₈(Al₆Si₆O₂₄)(SO₄)₂Cl·0.5H₂O | — | — |
| Tranquillityite | (Fe²⁺,Ca)₈(Zr,Y)₂Ti₃(SiO₄)₃O₁₂ | — | — |
| Transjordanite | Ni₂P | — | — |
| Traskite | Ba₂₁Ca(Fe²⁺,Mn,Ti)₄(Ti,Fe,Mg)₁₂(Si₁₂O₃₆)(Si₂O₇)₆(O,OH)₃₀Cl₆·14H₂O | — | — |
| Trikalsilite | K₂NaAl₃(SiO₄)₃ | — | — |
| Trinepheline | NaAlSiO₄ | — | 2.58 g/cm³ |
| Tristramite | (Ca,U,Fe)(PO₄,SO₄)·2H₂O | — | — |
| Troilite | FeS | — | 4.29 g/cm³ |
| Tsangpoite | Ca₅(PO₄)₂(SiO₄) | — | — |
| Tungstenite | WS₂ | — | 7.23 g/cm³ |
| Turneaureite | Ca₅(AsO₄)₃Cl | — | — |
| Vanadinite | Pb₅(VO₄)₃Cl | 3.0 | 6.88 g/cm³ |
| Vaterite | Ca(CO₃) | — | 2.70 g/cm³ |
| Vavřínite | Ni₂SbTe₂ | — | — |
| Vernadite | (Mn₄+,Fe³⁺,Ca,Na)(O,OH)₂ * nH₂O | — | — |
| Vishnevite | Na₈(Al₆Si₆)O₂₄(SO₄)·2H₂O | — | — |
| Vozhminite | (Ni,Co)₄(As,Sb)S₂ | — | — |
| Wadeite | K₂Zr(Si₃O₉) | — | 2.98 g/cm³ |
| Wallkilldellite | Ca₂Mn²⁺₃(AsO₄)₂(OH)₄ * 9H₂O | — | — |
| Wallkilldellite-(Fe) | (Ca,Cu)₄Fe²⁺₆(AsO₄,SiO₄)₄(OH,O)₈ * 18H₂O | — | — |
| Wardsmithite | Ca₅Mg[B₄O₇]₆ * 3₀H₂O | — | — |
| Wayneburnhamite | Pb₉Ca₆(Si₂O₇)₃(SiO₄)₃ | — | — |
| Weishanite | (Au,Ag,Hg) | 2.5 | — |
| Weissite | Cu₂₋ₓTe | — | — |
| Wenjiite | Ti10SixPy | — | — |
| Wenkite | Ba₄Ca₆(Si,Al)₂₀O₄₁(OH)₂(SO₄)₃(H₂O) | — | — |
| Whitecapsite | H₁₆Fe²⁺₅Fe³⁺₁₄Sb³⁺₆(AsO₄)₁₈O₁₆·120H₂O | — | — |
| Woodwardite | (Cu₁-ₓAlₓ)(SO₄)ₓ/₂(OH)₂ · nH₂O (x < 0.5, n < 3x/2) | 2.0 | — |
| Wortupaite | MgNi(Te⁴⁺O₃)₃·3H₂O | — | — |
| Wumuite | KAl₀.₃₃W₂.₆₇O₉ | — | — |
| Wurtzite | ZnS | — | 4.14 g/cm³ |
| Xifengite | Fe₅Si₃ | — | — |
| Yagiite | NaMg₂(AlMg₂Si₁₂)O₃₀ | — | — |
| Yarlongite | (Cr₄Fe₄Ni)C₄ | — | — |
| Yellowcatite | KNaFe³⁺₂(Se⁴⁺O₃)₂(V⁵⁺₂O₇)·7H₂O | — | — |
| Yimengite | K(Cr,Ti,Fe,Mg)₁₂O₁₉ | — | — |
| Yuanjiangite | AuSn | — | 11.38 g/cm³ |
| Yushkinite | (Mg,Al)(OH)₂VS₂ | — | — |
| Zaccagnaite | Zn₄Al₂(OH)₁₂[CO₃] * 3H₂O | — | — |
| Zagamiite | CaAl₂Si₃.₅O₁₁ | — | — |
| Zemannite | Mg₀.₅ZnFe³⁺(Te⁴⁺O₃)₃·4.5H₂O | — | — |
| Zemkorite | Na₂Ca(CO₃)₂ | 2.0 | — |
| Zenzénite | — | — | — |
| Zincite | ZnO | 4.0 | 5.70 g/cm³ |
| Zincohögbomite-2N2S | — | — | — |
| Zincohögbomite-2N6S | (Zn,Al)₇(Al,Fe³⁺,Ti,Mg)₁₆O₃₁(OH) | — | — |
| Zincorinmanite-(Zn) | ZnSb⁵⁺(Fe³⁺₂Zn)O₇(OH) | — | — |
| Zinkenite | Pb₉Sb₂₂S₄₂ | — | — |