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Monoclinic crystal system
1,774 minerals
| Mineral | Chemical formula | Mohs hardness | Density |
|---|---|---|---|
| Sarabauite | CaSb³⁺₁₀S₆O₁₀ | — | — |
| Saranchinaite | Na₂Cu(SO₄)₂ | — | — |
| Sarcopside | (Fe²⁺,Mn²⁺,Mg)₃(PO₄)₂ | — | — |
| Sardignaite | BiMo₂O₇(OH)·2H₂O | — | — |
| Sarkinite | Mn²⁺₂(AsO₄)(OH) | — | — |
| Sarrabusite | Pb₅CuCl₄(SeO₃)₄ | — | — |
| Sartorite | PbAs₂S₄ | 3.0 | — |
| Sarvodaite | Al₂(SO₄)₃·5H₂O | — | — |
| Sauconite | Na₀.₃Zn₃((Si,Al)₄O₁₀)(OH)₂ * 4H₂O | — | — |
| Sborgite | Na[B₅O₆(OH)₄]·3H₂O | — | — |
| Scainiite | Pb₁₄Sb₃₀S₅₄O₅ | — | — |
| Scandio-fluoro-eckermannite | NaNa₂(Mg₄Sc)(Si₈O₂₂)F₂ | — | — |
| Scawtite | Ca₇(Si₃O₉)₂CO₃ * 2H₂O | — | — |
| Schlemaite | (Cu,☐)₆(Pb,Bi)Se₄ | — | 7.54 g/cm³ |
| Schlüterite-(Y) | (Y,REE)₂AlSi₂O₇(OH)₂F | — | — |
| Schmiederite | Cu₂Pb₂(Se⁴⁺O₃)(Se⁶⁺O₄)(OH)₄ | — | — |
| Schreyerite | V³⁺₂Ti₃O₉ | — | — |
| Schultenite | Pb(AsO₃OH) | — | — |
| Sclarite | — | — | — |
| Scolecite | Ca(Si₃Al₂)O₁₀·3H₂O | — | — |
| Scorzalite | Fe²⁺Al₂(PO₄)₂(OH)₂ | — | — |
| Searlesite | NaBSi₂O₅(OH)₂ | — | — |
| Seidozerite | Na₂Zr₂Na₂MnTi(Si₂O₇)₂O₂F₂ | — | — |
| Selenodantopaite | Ag₅Bi₁₃Se₂₂ | — | — |
| Selenojunoite | Cu₂Pb₃Bi₈Se₁₆ | — | — |
| Semseyite | Pb₉Sb₈S₂₁ | 2.5 | — |
| Sengierite | Cu₂(UO₂)₂(VO₄)₂(OH)₂·6H₂O | 2.5 | — |
| Serpierite | Ca(Cu,Zn)₄(SO₄)₂(OH)₆·3H₂O | — | — |
| Serrabrancaite | Mn(PO₄)(H₂O) | 3.5 | — |
| Shabaite-(Nd) | — | — | — |
| Shabynite | Mg₅(BO₃)(OH)₅(Cl,OH)₂ * 4H₂O | — | — |
| Shakhdaraite-(Y) | — | — | — |
| Shasuite | CaNi₃(P₂O₇)₂ | — | 3.77 g/cm³ |
| Shchurovskyite | K₂CaCu₆O₂(AsO₄)₄ | — | — |
| Shimazakiite | Ca₂B₂O₅ | — | 2.78 g/cm³ |
| Shinarumpite | — | — | — |
| Shirokshinite | KNaMg₂(Si₄O₁₀)F₂ | — | 2.79 g/cm³ |
| Shkatulkalite | Na₁₀MnTi₃Nb₃(Si₂O₇)₆(OH)₂F·12H₂O | — | — |
| Shlykovite | KCa[Si₄O₉(OH)]·3H₂O | — | — |
| Shojiite | Na(NaMg)Mg₅Si₈O₂₂(OH)₂ | — | — |
| Shuiskite-(Cr) | — | — | — |
| Shuiskite-(Mg) | Ca₂MgCr₂(Si₂O₇)(SiO₄)(OH)₂ * 2H₂O | — | — |
| Shumwayite | — | — | — |
| Sibirskite | Ca₂(HB₂O₅)(OH) | — | — |
| Sidorenkite | — | — | — |
| Sigismundite | {Ba☐}{Fe²⁺☐}{Ca}{Na₂☐}{Fe²⁺₁₃}{Al}(PO₄)₁₁(HPO₄)(OH)₂ | — | — |
| Sigogglinite | [Pb₆Zn(OH)₈](SO₄)₃·3H₂O | — | — |
| Siligiite | [Pb(H₂O)₅(SO₄)][Zn₉(OH)₁₈] | — | — |
| Simmonsite | Na₂LiAlF₆ | — | — |
| Simplotite | CaV⁴⁺₄O₉·5H₂O | — | — |
| Sklodowskite | Mg(UO₂)₂(SiO₃OH)₂·6H₂O | — | — |
| Skorpionite | Ca₃Zn₂(PO₄)₂(CO₃)(OH)₂·H₂O | 3.5 | — |
| Slawsonite | Sr(Al₂Si₂O₈) | — | — |
| Sluzhenikinite | — | — | — |
| Smrkovecite | Bi₂(PO₄)O(OH) | — | — |
| Sobolevite | Na₆(Na₂Ca)(NaCaMn)Na₂Ti₂Na₂(TiMn)(Si₂O₇)₂ (PO₄)₄O₂(OF)F₂ | — | — |
| Solongoite | Ca₂B₃O₄(OH)₄Cl | 3.5 | — |
| Sombrereteite | NaCa₃(Al₇Si₉)O₃₂ | — | — |
| Sonolite | Mn²⁺₉(SiO₄)₄(OH)₂ | — | — |
| Spaltiite | Tl₂Cu₂As₂S₅ | — | — |
| Spanoite | Tl₂[(UO₂)₂(V₂O₈)] | — | — |
| Sperlingite | (H₂O)K(Mn²⁺Fe³⁺)(Al₂Ti)(PO₄)₄[O(OH)] [(H₂O)₉(OH)]·4H₂O | — | — |
| Sphaerobertrandite | Be₃(SiO₄)(OH)₂ | — | — |
| Spodumene | LiAlSi₂O₆ | — | — |
| Spurrite | Ca₅(SiO₄)₂(CO₃) | 5.0 | — |
| Stanevansite | Mg(C₂H₃O₃)₂·2H₂O | — | — |
| Stanfieldite | Ca₄Mg₅(PO₄)₆ | — | — |
| Starkeyite | MgSO₄·4H₂O | — | — |
| Staurolite | Fe²⁺₂Al₉Si₄O₂₃(OH) | — | — |
| Stenonite | (Sr,Ba,Na)₂Al(CO₃)F₅ | — | — |
| Steropesite | Tl₃BiCl₆ | — | 5.69 g/cm³ |
| Steverustite | Pb²⁺₅(OH)₅[Cu¹⁺(S⁶⁺O₃S²⁻)₃](H₂O)₂ | — | — |
| Stibioclaudetite | AsSbO₃ | — | 4.94 g/cm³ |
| Stilbite-Ca | NaCa₄(Si₂₇Al₉)O₇₂·28H₂O | — | — |
| Stilbite-Na | Na₉(Si₂₇Al₉)O₇₂·28H₂O | — | — |
| Stoiberite | Cu₅(VO₄)₂O₂ | — | — |
| Straczekite | (Ca,K,Ba)V₈O₂₀·3H₂O | — | — |
| Strashimirite | Cu₄(AsO₄)₂(OH)₂·2.5H₂O | — | — |
| Strontioborite | SrB₈O₁₁(OH)₄ | — | — |
| Strontiochevkinite | (Sr,La,Ce,Ca)₄Fe²⁺(Ti,Zr)₂Ti₂(Si₂O₇)₂O₈ | — | — |