| Saamite | Ba☐TiNbNa₃Ti(Si₂O₇)₂O₂(OH)₂(H₂O)₂ | Triclinic | 3.0 | — |
| Sabatierite | Cu₆TlSe₄ | Orthorhombic | — | — |
| Sabelliite | (Cu,Zn)₂Zn(AsO₄,SbO₄)(OH)₃ | — | — | — |
| Sabieite | (NH₄)Fe³⁺(SO₄)₂ | Trigonal | — | — |
| Sabinaite | Na₄Zr₂TiO₄(CO₃)₄ | Monoclinic | — | 3.30 g/cm³ |
| Sabugalite | HAl(UO₂)₄(PO₄)₄·16H₂O | Monoclinic | 2.5 | — |
| Saccoite | — | Tetragonal | — | — |
| Sachanbińskiite | NaMn₄(Al₅Be)(AlSi₅O₁₈)₂·2H₂O | Orthorhombic | — | — |
| Sacrofanite | (Na₆₁K₁₉Ca₃₂)(Si₈₄Al₈₄O₃₃₆)(SO₄)₂₆Cl₂F₆*₂H₂O | Hexagonal | — | — |
| Sadanagaite | {Na}{Ca₂}{Mg₃Al₂}(Si₅Al₃O₂₂)(OH)₂ | Monoclinic | — | — |
| Saddlebackite | Pb₂Bi₂Te₂S₃ | — | — | — |
| Safflorite | CoAs₂ | Orthorhombic | — | 7.55 g/cm³ |
| Sahamalite-(Ce) | Ce₂Mg(CO₃)₄ | Monoclinic | — | — |
| Sahlinite | Pb₁₄(AsO₄)₂O₉Cl₄ | Monoclinic | — | — |
| Sailaufite | (Ca,Na,☐)₂Mn³⁺₃(AsO₄)₂(CO₃)O₂ * 3H₂O | — | — | — |
| Sainfeldite | Ca₅(AsO₄)₂(AsO₃OH)₂·4H₂O | — | — | — |
| Sakhaite | Ca₄₈Mg₁₆(BO₃)₃₂(CO₃)₁₆·2(H₂O,HCl) | Cubic | — | — |
| Sakhanaiskite | (Fe²⁺Ti)Nb₂O₈ | Monoclinic | — | — |
| Sakuraiite | (Cu,Zn,Fe,In,Sn)S | Cubic | 4.0 | 4.45 g/cm³ |
| Salammoniac | NH₄Cl | Cubic | — | — |
| Salesite | Cu(IO₃)(OH) | Orthorhombic | — | — |
| Saliotite | (Li,Na)Al₃(Si₃Al)O₁₀(OH)₅ | — | — | — |
| Saltonseaite | K₃NaMnCl₆ | Trigonal | — | 2.25 g/cm³ |
| Salzburgite | Cu₁.₆Pb₁.₆Bi₆.₄S₁₂ | — | — | — |
| Saléeite | Mg(UO₂)₂(PO₄)₂·10H₂O | Monoclinic | — | — |
| Samaniite | Cu₂Fe₅Ni₂S₈ | Tetragonal | — | — |
| Samarskite-(Y) | YFe³⁺Nb₂O₈ | Orthorhombic | — | — |
| Samarskite-(Yb) | YbNbO₄ | Monoclinic | — | 7.68 g/cm³ |
| Samfowlerite | Ca₂₈Mn₆Zn₄(Be,Zn)₄Be₁₂[(OH)₃|(SiO₄)₃|(Si₂O₇)₂]₄ | Monoclinic | — | — |
| Sampleite | NaCaCu₅(PO₄)₄Cl·5H₂O | Orthorhombic | 4.0 | — |
| Samraite | Ni₂P₂O₇ | Monoclinic | — | 4.28 g/cm³ |
| Samsonite | Ag₄MnSb₂S₆ | Monoclinic | — | — |
| Samuelsonite | (Ca,Ba)Ca₈Fe²⁺₂Mn²⁺₂Al₂(PO₄)₁₀(OH)₂ | — | — | — |
| Sanbornite | BaSi₂O₅ | Orthorhombic | — | 3.73 g/cm³ |
| Sanderite | MgSO₄ * 2H₂O | Orthorhombic | — | — |
| Saneroite | NaMn²⁺₅[Si₅O₁₄(OH)](VO₃)(OH) | — | — | — |
| Sangenaroite | — | Monoclinic | — | — |
| Sanguite | KCuCl₃ | Monoclinic | — | 2.87 g/cm³ |
| Sanidine | KAlSi₃O₈ | Monoclinic | 6.0 | 2.46 g/cm³ |
| Sanmartinite | ZnWO₄ | Monoclinic | 5.0 | — |
| Sanrománite | Na₂CaPb₃(CO₃)₅ | Hexagonal | 4.0 | — |
| Santabarbaraite | Fe³⁺₃(PO₄)₂(OH)₃ * 5H₂O | Amorphous | — | — |
| Santaclaraite | CaMn₄[Si₅O₁₄OH](OH) * H₂O | — | — | — |
| Santafeite | (Na,Ca,Sr)₁₂(Mn²⁺,Fe³⁺,Al,Mg)₈Mn₄+₈(VO₄)₁₆(OH,O)₂₀ * 8H₂O | Orthorhombic | — | — |
| Santanaite | Pb₁₁(CrO₄)O₁₂ | Hexagonal | — | — |
| Santarosaite | CuB₂O₄ | Tetragonal | — | 4.00 g/cm³ |
| Santite | K[B₅O₆(OH)₄] * 2H₂O | Orthorhombic | — | — |
| Saponite | Ca₀.₂₅(Mg,Fe)₃((Si,Al)₄O₁₀)(OH)₂ * nH₂O | Monoclinic | — | — |
| Sapozhnikovite | Na₈(Al₆Si₆O₂₄)(HS)₂ | Cubic | — | — |
| Sapphirine | Mg₄(Mg₃Al₉)O₄[Si₃Al₉O₃₆] | Monoclinic | 7.5 | — |
| Sarabauite | CaSb³⁺₁₀S₆O₁₀ | Monoclinic | — | — |
| Saranchinaite | Na₂Cu(SO₄)₂ | Monoclinic | — | — |
| Saranovskite | — | Trigonal | — | — |
| Sarcolite | Na₄Ca₁₂Al₈Si₁₂O₄₆(SiO₄,PO₄)(OH,H₂O)₄(CO₃,Cl) | Tetragonal | — | — |
| Sarcopside | (Fe²⁺,Mn²⁺,Mg)₃(PO₄)₂ | Monoclinic | — | — |
| Sardignaite | BiMo₂O₇(OH)·2H₂O | Monoclinic | — | — |
| Sarkinite | Mn²⁺₂(AsO₄)(OH) | Monoclinic | — | — |
| Sarmientite | Fe³⁺₂(AsO₄)(SO₄)(OH) * 5H₂O | — | — | — |
| Sarrabusite | Pb₅CuCl₄(SeO₃)₄ | Monoclinic | — | — |
| Sartorite | PbAs₂S₄ | Monoclinic | 3.0 | — |
| Sarvodaite | Al₂(SO₄)₃·5H₂O | Monoclinic | — | — |
| Saryarkite-(Y) | Ca(Y,Th)Al₅(SiO₄)₂(PO₄)₂(OH)₇·6H₂O | — | — | 3.07 g/cm³ |
| Sasaite | (Al,Fe³⁺)₁₄(PO₄)₁₁(SO₄)(OH)₇·83H₂O | — | — | — |
| Sassolite | B(OH)₃ | Triclinic | 1.0 | 1.65 g/cm³ |
| Satimolite | KNa₂(Al₅Mg₂)[B₁₂O₁₈(OH)₁₂](OH)₆Cl₄*₄H₂O | — | — | — |
| Satpaevite | Al₁₂(V⁴⁺,V⁵⁺)₈O₃₇·30H₂O (?) | — | 1.5 | — |
| Satterlyite | (Fe²⁺,Mg,Fe)₁₂(PO₄)₅(PO₃OH)(OH,O)₆ | Trigonal | — | — |
| Sauconite | Na₀.₃Zn₃((Si,Al)₄O₁₀)(OH)₂ * 4H₂O | Monoclinic | — | — |
| Savelievaite | Mg₂Cr³⁺O₂(BO₃) | Orthorhombic | — | — |
| Sayrite | Pb₂(UO₂)₅O₆(OH)₂ * 4H₂O | — | — | — |
| Sazhinite-(Ce) | Na₂CeSi₆O₁₄*₆H₂O | — | — | — |
| Sazhinite-(La) | Na₃LaSi₆O₁₅·2H₂O | Orthorhombic | — | — |
| Sazykinaite-(Y) | Na₅YZr[SiO₃]₆ * 6H₂O | — | — | — |
| Sbacchiite | Ca₂AlF₇ | Orthorhombic | — | — |
| Sborgite | Na[B₅O₆(OH)₄]·3H₂O | Monoclinic | — | — |
| Scacchite | MnCl₂ | Trigonal | — | 2.92 g/cm³ |
| Scainiite | Pb₁₄Sb₃₀S₅₄O₅ | Monoclinic | — | — |
| Scandio-fluoro-eckermannite | NaNa₂(Mg₄Sc)(Si₈O₂₂)F₂ | Monoclinic | — | — |
| Scandiobabingtonite | Ca₂(Fe²⁺,Mn)ScSi₅O₁₄(OH) | — | — | — |
| Scarbroite | Al₅(CO₃)(OH)₁₃·5H₂O | Hexagonal | — | — |
| Scawtite | Ca₇(Si₃O₉)₂CO₃ * 2H₂O | Monoclinic | — | — |
| Scenicite | — | Orthorhombic | — | — |
| Schachnerite | Ag₁.₁Hg₀.₉ | Hexagonal | 3.5 | — |
| Schafarzikite | Fe²⁺Sb³⁺₂O₄ | Tetragonal | — | — |
| Schairerite | Na₂₁(SO₄)₇ClF₆ | Trigonal | — | — |
| Schallerite | Mn²⁺₁₆As₃Si₁₂O₃₆(OH)₁₇ | — | — | — |
| Schapbachite | Ag₀.₄Pb₀.₂Bi₀.₄S | — | — | — |
| Schaurteite | Ca₃Ge(SO₄)₂(OH)₆ * 4H₂O | Hexagonal | — | — |
| Scheelite | CaWO₄ | Tetragonal | — | 6.10 g/cm³ |
| Schertelite | (NH₄)₂MgH₂(PO₄)₂ * 4H₂O | — | — | — |
| Scheuchzerite | NaMn²⁺₉Si₉V⁵⁺O₂₈(OH)₄ | Triclinic | — | — |
| Schiavinatoite | (Nb,Ta)(BO₄) | Tetragonal | — | — |
| Schieffelinite | Pb₁₀Te₆+₆O₂₀(OH)₁₄(SO₄)(H₂O)₅ | Orthorhombic | — | — |
| Schindlerite | {(NH₄)₄[Na₂(H₂O)₁₀]}{V₁₀O₂₈} | Triclinic | — | — |
| Schizolite | NaCaMnSi₃O₈(OH) | Triclinic | — | — |
| Schlegelite | Bi₇(AsO₄)₃(MoO₄)₂O₄ | — | — | — |
| Schlemaite | (Cu,☐)₆(Pb,Bi)Se₄ | Monoclinic | — | 7.54 g/cm³ |
| Schlossmacherite | (H₃O)Al₃(SO₄)₂(OH)₆ | Trigonal | — | — |
| Schlüterite-(Y) | (Y,REE)₂AlSi₂O₇(OH)₂F | Monoclinic | — | — |
| Schmidite | — | Orthorhombic | — | — |
| Schmiederite | Cu₂Pb₂(Se⁴⁺O₃)(Se⁶⁺O₄)(OH)₄ | Monoclinic | — | — |
| Schmitterite | (UO₂)(TeO₃) | — | — | — |
| Schneebergite | BiCo₂(AsO₄)₂(OH)·H₂O | — | 4.5 | — |
| Schneiderhöhnite | — | Triclinic | 3.0 | — |
| Schoderite | Al₂(PO₄)(VO₄) * 8H₂O | — | — | — |
| Schoenfliesite | MgSn(OH)₆ | — | — | — |
| Schoepite | (UO₂)₈O₂(OH)₁₂ * 12H₂O | Orthorhombic | 2.5 | — |
| Scholzite | CaZn₂(PO₄)₂ * 2H₂O | — | — | — |
| Schoonerite | ZnMn²⁺Fe²⁺₂Fe³⁺(PO₄)₃(OH)₂ * 9H₂O | — | — | — |
| Schorl | Na(Fe²⁺₃)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH) | Trigonal | 7.0 | — |
| Schorlomite | — | Cubic | — | — |
| Schreibersite | (Fe,Ni,Cr)₃P | Tetragonal | — | — |
| Schreyerite | V³⁺₂Ti₃O₉ | Monoclinic | — | — |
| Schröckingerite | NaCa₃(UO₂)(SO₄)(CO₃)₃F·10H₂O | Triclinic | 2.5 | — |
| Schubnelite | Fe³⁺VO₄ * H₂O | — | — | — |
| Schuetteite | Hg²⁺₃(SO₄)O₂ | Trigonal | — | — |
| Schuilingite-(Nd) | PbCu(Nd,Gd,Sm,Y)(CO₃)₃(OH) * 1.₅H₂O | Orthorhombic | — | — |
| Schulenbergite | (Cu,Zn)₇(SO₄)₂(OH)₁₀·3H₂O | Trigonal | 2.0 | — |
| Schultenite | Pb(AsO₃OH) | Monoclinic | — | — |
| Schumacherite | Bi₃(VO₄)₂O(OH) | — | — | — |
| Schwartzembergite | Pb²⁺₅H₂I³⁺O₆Cl₃ | Tetragonal | — | — |
| Schwertmannite | Fe³⁺₁₆O₁₆(OH)₉.₆(SO₄)₃.₂·10H₂O | Tetragonal | — | — |
| Schäferite | (NaCa₂)Mg₂(VO₄)₃ | Cubic | 5.0 | — |
| Schöllhornite | — | Trigonal | — | — |
| Schüllerite | Ba₂Ti₂Na₂Mg₂(Si₂O₇)₂O₂F₂ | Triclinic | — | — |
| Sclarite | — | Monoclinic | — | — |
| Scolecite | Ca(Si₃Al₂)O₁₀·3H₂O | Monoclinic | — | — |
| Scordariite | — | Trigonal | — | — |
| Scorodite | Fe³⁺AsO₄·2H₂O | Orthorhombic | — | — |
| Scorticoite | — | Trigonal | — | — |
| Scorzalite | Fe²⁺Al₂(PO₄)₂(OH)₂ | Monoclinic | — | — |
| Scotlandite | — | — | — | — |
| Scottyite | BaCu₂Si₂O₇ | Orthorhombic | — | — |
| Scrutinyite | α-PbO₂ | — | — | — |
| Seaborgite | — | Triclinic | 2.5 | — |
| Seamanite | — | Orthorhombic | — | — |
| Searlesite | NaBSi₂O₅(OH)₂ | Monoclinic | — | — |
| Sederholmite | NiSe | Hexagonal | — | 7.24 g/cm³ |
| Seeligerite | Pb₃(IO₄)Cl₃ | Orthorhombic | — | — |
| Seelite | Mg(UO₂)₂(AsO₃,AsO₄)₂·7H₂O | — | — | — |
| Segelerite | — | — | — | — |
| Segerstromite | Ca₃(As⁵⁺O₄)₂[As³⁺(OH)₃]₂ | Cubic | — | — |
| Segnitite | — | — | — | — |
| Seidite-(Ce) | Na₄(Ce,Sr)₂[TiSi₈O₁₈(OH)₂](O,OH,F)₄ * 5H₂O | — | — | — |
| Seidozerite | Na₂Zr₂Na₂MnTi(Si₂O₇)₂O₂F₂ | Monoclinic | — | — |
| Seifertite | — | Orthorhombic | — | — |
| Sejkoraite-(Y) | Y₂[(UO₂)₈O₆(SO₄)₄(OH)₂]·26H₂O | Triclinic | — | — |
| Sekaninaite | (Fe,Mg)₂Al₃(AlSi₅O₁₈) | Orthorhombic | — | — |
| Selenium | Se | Trigonal | — | — |
| Selenodantopaite | Ag₅Bi₁₃Se₂₂ | Monoclinic | — | — |
| Selenojalpaite | Ag₃CuSe₂ | Tetragonal | — | — |
| Selenojunoite | Cu₂Pb₃Bi₈Se₁₆ | Monoclinic | — | — |
| Selenopolybasite | Cu(Ag,Cu)₆Ag₉Sb₂(S,Se)₉Se₂ | Trigonal | — | — |
| Selenostephanite | Ag₅SbSe₄ | — | — | — |
| Seligmannite | CuPbAsS₃ | Orthorhombic | — | 5.24 g/cm³ |
| Selivanovaite | (Na,Ca)₃(Ti,Fe)₅[Si₄O₁₈(OH)₃]*₇H₂O | Triclinic | — | — |
| Sellaite | MgF₂ | Tetragonal | — | 3.19 g/cm³ |
| Selwynite | NaKBeZr₂(PO₄)₄·2H₂O | — | — | — |
| Semenovite-(Ce) | Na₈Ca₂FeBe₆Ce₂Si₁₄O₄₀(OH)₄F₄ | — | — | — |
| Semseyite | Pb₉Sb₈S₂₁ | Monoclinic | 2.5 | — |
| Senaite | Pb(Mn,Y,U)(Fe,Zn)₂(Ti,Fe,Cr,V)₁₈(O,OH)₃₈ | — | — | — |
| Senandorite | AgPbSb₃S₆ | Orthorhombic | — | — |
| Senarmontite | Sb₂O₃ | Cubic | — | — |
| Senegalite | Al₂(PO₄)(OH)(OH)₂ * H₂O | Orthorhombic | 5.5 | — |
| Sengierite | Cu₂(UO₂)₂(VO₄)₂(OH)₂·6H₂O | Monoclinic | 2.5 | — |
| Senkevichite | CsKNaCa₂Ti[O|Si₇O₁₈(OH)] | — | — | — |
| Sepiolite | Mg₄Si₆O₁₅(OH)₂·6H₂O | Orthorhombic | 2.2 | — |
| Serandite | NaMn²⁺₂Si₃O₈(OH) | Triclinic | — | — |
| Serendibite | Ca₄[Mg₆Al₆]O₄[Si₆B₃Al₃O₃₆] | Triclinic | — | — |
| Sergeevite | Ca₂Mg₁₁(CO₃)₉(HCO₃)₄(OH)₄*₆H₂O | — | — | — |
| Sergevanite | — | Trigonal | — | — |
| Sergeysmirnovite | MgZn₂(PO₄)₂·4H₂O | Orthorhombic | — | — |
| Serpierite | Ca(Cu,Zn)₄(SO₄)₂(OH)₆·3H₂O | Monoclinic | — | — |
| Serrabrancaite | Mn(PO₄)(H₂O) | Monoclinic | 3.5 | — |
| Sewardite | CaFe³⁺₂(AsO₄)₂(OH)₂ | — | 3.5 | 4.16 g/cm³ |
| Shabaite-(Nd) | — | Monoclinic | — | — |
| Shabynite | Mg₅(BO₃)(OH)₅(Cl,OH)₂ * 4H₂O | Monoclinic | — | — |
| Shadlunite | (Pb,Cd)(Fe,Cu)₈S₈ | Cubic | — | — |
| Shafranovskite | Na₃K₂(Mn,Fe,Na)₄[Si₉(O,OH)₂₇](OH)₂·nH₂O | — | — | — |
| Shagamite | KFe₁₁O₁₇ | Hexagonal | — | — |
| Shakhdaraite-(Y) | — | Monoclinic | — | — |
| Shakhovite | — | — | — | — |
| Shandite | Ni₃Pb₂S₂ | Trigonal | 4.0 | 8.73 g/cm³ |
| Shannonite | Pb₂OCO₃ | Orthorhombic | — | 7.36 g/cm³ |
| Sharpite | — | Orthorhombic | — | — |
| Sharyginite | — | Orthorhombic | — | — |
| Shasuite | CaNi₃(P₂O₇)₂ | Monoclinic | — | 3.77 g/cm³ |
| Shattuckite | — | Orthorhombic | 3.5 | — |
| Shcherbakovite | (K,Ba)KNa(Ti,Nb)₂(Si₄O₁₂)O₂ | — | — | — |
| Shcherbinaite | V2O5 | Orthorhombic | — | 3.28 g/cm³ |
| Shchurovskyite | K₂CaCu₆O₂(AsO₄)₄ | Monoclinic | — | — |
| Sheldrickite | — | Trigonal | — | — |
| Shenganfuite | PbTe⁴⁺₃O₅(OH)Cl₃(H₂O) | Triclinic | — | — |
| Shenzhuangite | NiFeS₂ | Tetragonal | — | — |
| Sherwoodite | Ca₄.₅AlV₁₄O₄₀·28H₂O | Tetragonal | — | — |
| Shibkovite | K(☐,K,Na)₂Zn₃Ca₂[Si₁₂O₃₀] | — | — | — |
| Shigaite | Mn₆Al₃(OH)₁₈[Na(H₂O)₆](SO₄)₂ * 6H₂O | Trigonal | — | — |
| Shijiangshanite | Pb₃CaAl(Si₅O₁₄)(OH)₃(H₂O)₃ | Trigonal | — | — |
| Shilovite | Cu(NH₃)₄(NO₃)₂ | Orthorhombic | — | — |
| Shimazakiite | Ca₂B₂O₅ | Monoclinic | — | 2.78 g/cm³ |
| Shinarumpite | — | Monoclinic | — | — |
| Shinichengite | Ca₅[BSi₂O₇(OH)₂]₂·6H₂O | Triclinic | — | — |
| Shinkolobweite | — | Orthorhombic | — | — |
| Shiranuiite | Cu⁺(Rh³⁺Rh⁴⁺)S₄ | Cubic | — | — |
| Shirokshinite | KNaMg₂(Si₄O₁₀)F₂ | Monoclinic | — | 2.79 g/cm³ |
| Shirozulite | — | — | — | — |
| Shkatulkalite | Na₁₀MnTi₃Nb₃(Si₂O₇)₆(OH)₂F·12H₂O | Monoclinic | — | — |
| Shlykovite | KCa[Si₄O₉(OH)]·3H₂O | Monoclinic | — | — |
| Shojiite | Na(NaMg)Mg₅Si₈O₂₂(OH)₂ | Monoclinic | — | — |
| Shomiokite-(Y) | Na₃Y(CO₃)₃·3H₂O | Orthorhombic | — | — |
| Shortite | — | Orthorhombic | — | — |
| Shosanbetsuite | Ag₃Sn | Orthorhombic | — | — |
| Shuangfengite | IrTe₂ | — | 3.0 | — |
| Shubnikovite | Ca₂Cu₈(AsO₄)₆Cl(OH)·7H₂O | — | — | — |
| Shuiskite-(Cr) | — | Monoclinic | — | — |
| Shuiskite-(Mg) | Ca₂MgCr₂(Si₂O₇)(SiO₄)(OH)₂ * 2H₂O | Monoclinic | — | — |
| Shulamitite | Ca₃TiFe³⁺AlO₈ | Orthorhombic | — | — |
| Shumwayite | — | Monoclinic | — | — |
| Shuvalovite | K₂(Ca₂Na)(SO₄)₃F | Orthorhombic | — | — |
| Sibirskite | Ca₂(HB₂O₅)(OH) | Monoclinic | — | — |
| Sicherite | TlAg₂(As,Sb)₃S₆ | Orthorhombic | — | — |
| Sicklerite | Li₁-x(Mn³⁺xMn²⁺₁-x)PO₄ | Orthorhombic | — | — |
| Siderazot | Fe₅N₂ | Hexagonal | — | — |
| Siderite | FeCO₃ | Trigonal | 4.0 | 3.96 g/cm³ |
| Sideronatrite | — | Orthorhombic | — | — |
| Siderophyllite | — | — | — | — |
| Siderotil | Fe(SO₄)·5H₂O | Triclinic | — | — |
| Sidorenkite | — | Monoclinic | — | — |
| Sidorovite | Fe₃Pt | Cubic | — | — |
| Sidpietersite | Pb²⁺₄(S₂O₃)O₂(OH)₂ | Triclinic | — | — |
| Siegenite | CoNi₂S₄ | Cubic | — | — |
| Sieleckiite | Cu₃Al₄(PO₄)₂(OH)₁₂ * 2H₂O | — | — | — |
| Sigismundite | {Ba☐}{Fe²⁺☐}{Ca}{Na₂☐}{Fe²⁺₁₃}{Al}(PO₄)₁₁(HPO₄)(OH)₂ | Monoclinic | — | — |
| Sigloite | — | — | — | — |
| Sigogglinite | [Pb₆Zn(OH)₈](SO₄)₃·3H₂O | Monoclinic | — | — |
| Siidraite | — | Orthorhombic | — | — |
| Silesiaite | Ca₂Fe³⁺Sn(Si₂O₇)(Si₂O₆OH) | Triclinic | — | — |
| Silicocarnotite | Ca₅[(PO₄)(SiO₄)](PO₄) | Orthorhombic | — | — |
| Siligiite | [Pb(H₂O)₅(SO₄)][Zn₉(OH)₁₈] | Monoclinic | — | — |
| Silinaite | NaLiSi₂O₅ * 2H₂O | — | — | — |
| Sillimanite | Al₂OSiO₄ | Orthorhombic | 7.0 | 3.68 g/cm³ |
| Sillénite | — | Cubic | — | — |
| Silvialite | Ca₄Al₆Si₆O₂₄(SO₄) | — | — | — |
| Simferite | LiMg(PO₄) | Orthorhombic | — | 2.89 g/cm³ |
| Simmonsite | Na₂LiAlF₆ | Monoclinic | — | — |
| Simonellite | C₁₉H₂₄ | Orthorhombic | — | — |
| Simonkolleite | Zn₅Cl₂(OH)₈·H₂O | — | — | — |
| Simplotite | CaV⁴⁺₄O₉·5H₂O | Monoclinic | — | — |
| Simpsonite | Al₄Ta₃O₁₃(OH) | Trigonal | 7.5 | — |
| Sincosite | Ca(VO)₂(PO₄)₂·4H₂O | — | — | — |
| Sinhalite | MgAlBO₄ | Orthorhombic | — | 3.35 g/cm³ |
| Sinjarite | CaCl₂·2H₂O | Tetragonal | 1.5 | — |
| Sinkankasite | Mn²⁺Al(PO₃OH)₂(OH) · 6H₂O | — | — | — |
| Sinnerite | Cu₆As₄S₉ | Triclinic | — | — |
| Sinoite | Si₂N₂O | Orthorhombic | — | — |
| Sitinakite | KNa₂Ti₄(SiO₄)₂O₅(OH)·4H₂O | — | — | — |
| Siudaite | Na₈(Mn²⁺₂Na)Ca₆(Fe³⁺Mn²⁺)₃Zr₃NbSi₂₄(Si,☐,Ti)O₇₄(OH)₂Cl·5H₂O | — | — | — |
| Siwaqaite | Ca₆Al₂(CrO₄)₃(OH)₁₂·26H₂O | Trigonal | — | — |
| Skaergaardite | PdCu | Cubic | 4.5 | 10.66 g/cm³ |
| Skinnerite | Cu₃SbS₃ | Cubic | — | — |
| Skippenite | Bi₂TeSe₂ | Trigonal | — | — |
| Sklodowskite | Mg(UO₂)₂(SiO₃OH)₂·6H₂O | Monoclinic | — | — |
| Skogbyite | Zr(Mg₂Mn³⁺₄)SiO₁₂ | Tetragonal | — | — |
| Skorpionite | Ca₃Zn₂(PO₄)₂(CO₃)(OH)₂·H₂O | Monoclinic | 3.5 | — |
| Skutterudite | CoAs₃ | Cubic | — | 6.84 g/cm³ |
| Slavkovite | Cu₁₃(AsO₄)₆(AsO₃OH)₄·23H₂O | Triclinic | — | — |
| Slavíkite | — | Trigonal | — | — |
| Slawsonite | Sr(Al₂Si₂O₈) | Monoclinic | — | — |
| Slottaite | SrFe³⁺₃(PO₄)(SO₄)(OH)₆ | Trigonal | — | — |
| Sluzhenikinite | — | Monoclinic | — | — |
| Smamite | — | Triclinic | — | — |
| Smirnite | Bi₂Te₄⁺O₅ | — | — | — |
| Smirnovskite | (Th,Ca)(PO₄)·nH₂O | — | — | — |
| Smithite | AgAsS₂ | — | — | — |
| Smithsonite | ZnCO₃ | Trigonal | 5.0 | 4.46 g/cm³ |
| Smolyaninovite | Co₃Fe³⁺₂(AsO₄)₄ * 1₁H₂O | — | — | — |
| Smrkovecite | Bi₂(PO₄)O(OH) | Monoclinic | — | — |
| Smythite | (Fe,Ni)₃₊ₓS₄ (x = 0 to 0.3) | — | — | — |
| Sobolevite | Na₆(Na₂Ca)(NaCaMn)Na₂Ti₂Na₂(TiMn)(Si₂O₇)₂ (PO₄)₄O₂(OF)F₂ | Monoclinic | — | — |
| Sobolevskite | Pd(Bi,Te) | Hexagonal | 4.0 | — |
| Sodalite | Na₄Si₃Al₃O₁₂Cl | Cubic | 6.0 | — |
| Soddyite | (UO₂)₂SiO₄·2H₂O | Orthorhombic | 3.5 | — |
| Sofiite | Zn₂(SeO₃)Cl₂ | Orthorhombic | 2.0 | — |
| Sogdianite | KZr₂(Li₃Si₁₂)O₃₀ | Hexagonal | 7.0 | 2.65 g/cm³ |
| Sokolovaite | CsLi₂Al(Si₄O₁₀)F₂ | — | — | — |
| Solongoite | Ca₂B₃O₄(OH)₄Cl | Monoclinic | 3.5 | — |
| Sombrereteite | NaCa₃(Al₇Si₉)O₃₂ | Monoclinic | — | — |
| Somersetite | Pb₈O₂(OH)₂(CO₃)₅ | Trigonal | — | — |
| Sonolite | Mn²⁺₉(SiO₄)₄(OH)₂ | Monoclinic | — | — |
| Sonoraite | Fe³⁺(TeO₃)(OH) * H₂O | — | — | — |
| Sopcheite | Ag₄Pd₃Te₄ | Orthorhombic | — | — |
| Sorbyite | CuPb₉(Sb,As)₁₁S₂₆ | — | — | — |
| Sorosite | Cu₁+x(Sn,Sb) | Hexagonal | — | — |
| Sosedkoite | (K,Na)₅Al₂(Ta,Nb)₂₂O₆₀ | — | — | — |
| Souzalite | (Mg,Fe²⁺)₃(Al,Fe³⁺)₄(PO₄)₄(OH)₆ * 2H₂O | — | — | — |
| Součekite | CuPbBi(S,Se)₃ | — | — | — |
| Spadaite | MgSiO₂(OH)₂·H₂O (?) | — | — | — |
| Spaltiite | Tl₂Cu₂As₂S₅ | Monoclinic | — | — |
| Spangolite | Cu₆AlSO₄(OH)₁₂Cl·3H₂O | Trigonal | — | — |
| Spanoite | Tl₂[(UO₂)₂(V₂O₈)] | Monoclinic | — | — |
| Spencerite | Zn₄(PO₄)₂(OH)₂ * 3H₂O | — | — | — |
| Sperlingite | (H₂O)K(Mn²⁺Fe³⁺)(Al₂Ti)(PO₄)₄[O(OH)] [(H₂O)₉(OH)]·4H₂O | Monoclinic | — | — |
| Sperrylite | PtAs₂ | Cubic | — | 10.56 g/cm³ |
| Spertiniite | Cu(OH)₂ | — | — | — |
| Spessartine | Mn²⁺₃Al₂(SiO₄)₃ | Cubic | — | 4.19 g/cm³ |
| Sphaerobertrandite | Be₃(SiO₄)(OH)₂ | Monoclinic | — | — |
| Sphaerobismoite | Bi₂O₃ | Tetragonal | — | — |
| Sphalerite | ZnS | Cubic | — | 4.14 g/cm³ |
| Spheniscidite | (NH₄)Fe³⁺₂(PO₄)₂(OH)(H₂O)·H₂O | — | — | — |
| Spherocobaltite | CoCO₃ | Trigonal | 4.0 | 4.29 g/cm³ |
| Spinel | MgAl₂O₄ | Cubic | 8.0 | 3.58 g/cm³ |
| Spionkopite | Cu₃₉S₂₈ | Trigonal | — | 5.13 g/cm³ |
| Spiridonovite | (Cu₁-xAgx)₂Te | Trigonal | — | — |
| Spiroffite | (Mn,Zn,Ca)₂Te₃,O₈ | — | — | — |
| Spodumene | LiAlSi₂O₆ | Monoclinic | — | — |
| Spriggite | Pb₃(UO₂)₆O₈(OH)₂ * 3H₂O | — | — | — |
| Springcreekite | BaV³⁺₃(PO₄)₂(OH, H₂O)₆ | — | — | — |
| Spryite | Ag₈(As³⁺₀.₅As⁵⁺₀.₅)S₆ | Orthorhombic | — | — |
| Spurrite | Ca₅(SiO₄)₂(CO₃) | Monoclinic | 5.0 | — |
| Srebrodolskite | Ca₂Fe³⁺₂O₅ | Orthorhombic | — | — |
| Srilankite | TiO₂ | — | — | 3.86 g/cm³ |
| Stalderite | Tl(Cu,Ag)(Zn,Fe,Hg)₂(As,Sb)₂S₆ | — | — | — |
| Stanevansite | Mg(C₂H₃O₃)₂·2H₂O | Monoclinic | — | — |
| Stanfieldite | Ca₄Mg₅(PO₄)₆ | Monoclinic | — | — |
| Stankeithite | MnMnTe⁴⁺₄O₁₀ | Tetragonal | — | — |
| Stanleyite | (V⁴⁺O)(SO₄)·6H₂O | Orthorhombic | — | — |
| Stannite | Cu₂FeSnS₄ | Tetragonal | 4.0 | — |
| Stannoidite | Cu₆⁺Cu₂²⁺(Fe²⁺,Zn)₃Sn₂S₁₂ | Orthorhombic | — | — |
| Stannopalladinite | Pd₃Sn₂ | Hexagonal | — | — |
| Starkeyite | MgSO₄·4H₂O | Monoclinic | — | — |
| Starovaite | KCu₅O(VO₄)₃ | Triclinic | — | — |
| Staročeskéite | Ag₀.₇₀Pb₁.₆₀(Bi₁.₃₅Sb₁.₃₅)S₆ | Orthorhombic | — | — |
| Staurolite | Fe²⁺₂Al₉Si₄O₂₃(OH) | Monoclinic | — | — |
| Stavelotite-(La) | La₃Mn²⁺₃Cu²⁺(Mn³⁺,Fe³⁺,Mn⁴⁺)₂₆(Si₂O₇)₆O₃₀ | Trigonal | — | — |
| Steacyite | K₀.₃(Na,Ca)₂ThSi₈O₂₀ | Tetragonal | — | — |
| Steedeite | NaMn₂[Si₃BO₉](OH)₂ | Triclinic | — | — |
| Steenstrupine-(Ce) | Na₁₄Ce₆Mn²⁺₂Fe³⁺₂Zr(PO₄)₇Si₁₂O₃₆(OH)₂·3H₂O | Trigonal | — | — |
| Stefanweissite | (Ca,REE)₂Zr₂(Nb,Ti)(Ti,Nb)₂Fe²⁺O₁₄ | Orthorhombic | — | — |
| Steigerite | Al(VO₄) * 3H₂O | — | — | — |
| Steinhardtite | Al | Cubic | — | — |
| Steiningerite | Ba₂Zr₂(Si₄O₁₂)O₂ | Tetragonal | — | — |
| Steinmetzite | Zn₂Fe³⁺(PO₄)₂(OH)·3H₂O | Triclinic | — | — |
| Steklite | KAl(SO₄)₂ | Trigonal | — | — |
| Stellerite | Ca₄(Si₂₈Al₈)O₇₂·28H₂O | Orthorhombic | — | — |
| Stenhuggarite | CaFeSb(AsO₃)₂O | Tetragonal | — | — |
| Stenonite | (Sr,Ba,Na)₂Al(CO₃)F₅ | Monoclinic | — | — |
| Stepanovite | NaMgFe³⁺(C₂O₄)₃·9H₂O | Trigonal | 2.0 | — |
| Stephanite | Ag₅SbS₄ | Orthorhombic | — | — |
| Stercorite | — | Triclinic | — | — |
| Sterlinghillite | Mn²⁺₃(AsO₄)₂ * 3H₂O | — | — | — |
| Sternbergite | AgFe₂S₃ | — | — | — |
| Steropesite | Tl₃BiCl₆ | Monoclinic | — | 5.69 g/cm³ |
| Sterryite | Cu(Ag,Cu)₃Pb₁₉(Sb,As)₂₂(As-As)S₅₆ | — | 3.5 | — |
| Stetindite-(Ce) | Ce(SiO₄) | Tetragonal | — | — |
| Stevensite | (Ca,Na)xMg₃-x(Si₄O₁₀)(OH)₂ | — | — | — |
| Steverustite | Pb²⁺₅(OH)₅[Cu¹⁺(S⁶⁺O₃S²⁻)₃](H₂O)₂ | Monoclinic | — | — |
| Stewartite | Mn²⁺Fe³⁺₂(PO₄)₂(OH)₂ * 8H₂O | Triclinic | 3.0 | 2.94 g/cm³ |
| Stibarsen | SbAs | Trigonal | — | — |
| Stibiconite | Sb³⁺Sb⁵⁺₂O₆(OH) | Cubic | — | — |
| Stibioclaudetite | AsSbO₃ | Monoclinic | — | 4.94 g/cm³ |
| Stibiocolumbite | SbNbO₄ | Orthorhombic | — | 5.62 g/cm³ |
| Stibiocolusite | Cu₁₃VSb₃S₁₆ | — | — | 4.66 g/cm³ |
| Stibiopalladinite | Pd₅Sb₂ | Hexagonal | — | — |
| Stibiosegnitite | Pb(Fe³⁺₂.₅Sb⁵⁺₀.₅)(AsO₄)₂(OH)₆ | Trigonal | — | — |
| Stibiotantalite | Sb³⁺TaO₄ | — | — | — |
| Stibioústalečite | Cu₆Cu₆(Sb₂Te₂)Se₁₃ | Cubic | — | — |
| Stibivanite | Sb₂VO₅ | Orthorhombic | — | — |
| Stibnite | Sb₂S₃ | Orthorhombic | 8.0 | — |
| Stichtite | Mg₆Cr₂CO₃(OH)₁₆·4H₂O | Trigonal | — | — |
| Stilbite-Ca | NaCa₄(Si₂₇Al₉)O₇₂·28H₂O | Monoclinic | — | — |
| Stilbite-Na | Na₉(Si₂₇Al₉)O₇₂·28H₂O | Monoclinic | — | — |
| Stilleite | ZnSe | Cubic | 5.0 | 5.27 g/cm³ |
| Stillwaterite | Pd₈As₃ | Trigonal | — | — |
| Stillwellite-(Ce) | CeBSiO₅ | Trigonal | — | 4.74 g/cm³ |
| Stillwellite-(La) | LaBSiO₅ | Trigonal | — | — |
| Stilpnomelane | (K,Ca,Na)(Fe,Mg,Al)₈(Si,Al)₁₂(O,OH)₃₆·nH₂O | — | — | — |
| Stishovite | SiO₂ | Tetragonal | 9.4 | 2.63 g/cm³ |
| Stistaite | SnSb | Trigonal | 3.0 | — |
| Stoiberite | Cu₅(VO₄)₂O₂ | Monoclinic | — | — |
| Stokesite | CaSn[Si₃O₉] * 2H₂O | Orthorhombic | 6.0 | — |
| Stolperite | AlCu | Cubic | — | 5.51 g/cm³ |
| Stolzite | PbWO₄ | Tetragonal | — | 8.32 g/cm³ |
| Stoppaniite | Be₃Fe³⁺₂(Si₆O₁₈) * H₂O | Hexagonal | — | — |
| Stornesite-(Y) | Na₆(Ca₅Na₃)YMg₄₃(PO₄)₃₆ | — | — | — |
| Stottite | Fe²⁺Ge⁴⁺(OH)₆ | — | 4.5 | — |
| Stracherite | BaCa₆(SiO₄)₂[(PO₄)(CO₃)]₂F | Trigonal | — | — |
| Straczekite | (Ca,K,Ba)V₈O₂₀·3H₂O | Monoclinic | — | — |
| Strakhovite | NaBa₃Mn²⁺₂Mn³⁺₂Si₆O₁₉(OH)₃ | — | — | — |
| Strandite | Pb₃Mn³⁺₄Mn⁴⁺₃O₁₅ | Hexagonal | — | — |
| Stranskiite | Zn₂Cu(AsO₄)₂ | Triclinic | 4.0 | 4.73 g/cm³ |
| Strashimirite | Cu₄(AsO₄)₂(OH)₂·2.5H₂O | Monoclinic | — | — |
| Strelkinite | Na₂(UO₂)₂(VO₄)₂·6H₂O | Orthorhombic | — | — |
| Strengite | FePO₄ * 2H₂O | Orthorhombic | 3.5 | — |
| Stringhamite | CaCu(SiO₄) * H₂O | — | — | — |
| Stromeyerite | CuAgS | Orthorhombic | — | — |
| Stronadelphite | Sr₅(PO₄)₃F | Hexagonal | — | 3.99 g/cm³ |
| Stronalsite | Na₂SrAl₄Si₄O₁₆ | Orthorhombic | 6.5 | 2.92 g/cm³ |
| Strontianite | Sr(CO₃) | Orthorhombic | 3.5 | 3.78 g/cm³ |
| Strontio-orthojoaquinite | (Na,Fe)₂Sr₂Ba₂Ti₂[Si₄O₁₂]₂O₂(O,OH)₂ * H₂O | Orthorhombic | — | — |
| Strontioborite | SrB₈O₁₁(OH)₄ | Monoclinic | — | — |
| Strontiochevkinite | (Sr,La,Ce,Ca)₄Fe²⁺(Ti,Zr)₂Ti₂(Si₂O₇)₂O₈ | Monoclinic | — | — |
| Strontiodresserite | SrAl₂(CO₃)₂(OH)₄·H₂O | Orthorhombic | — | — |
| Strontiofluorite | SrF₂ | Cubic | — | 4.28 g/cm³ |
| Strontioginorite | CaSrB₁₄O₂₀(OH)₆ * 5H₂O | Monoclinic | — | — |
| Strontiohurlbutite | SrBe₂(PO₄)₂ | Monoclinic | — | 3.15 g/cm³ |
| Strontiojoaquinite | Sr₂Ba₂(Na,Fe)₂Ti₂[Si₄O₁₂]₂O₂(O,OH)₂ * H₂O | Monoclinic | — | — |
| Strontiomelane | Sr(Mn⁴⁺₆Mn³⁺₂)O₁₆ | — | — | — |
| Strontioperloffite | SrMn²⁺₂Fe³⁺₂(PO₄)₃(OH)₃ | Monoclinic | — | — |
| Strontiopharmacosiderite | Sr₀.₅Fe₄[(AsO₄)₃(OH)₄]·4H₂O | Tetragonal | — | — |
| Strontioruizite | Sr₂Mn³⁺₂Si₄O₁₁(OH)₄·2H₂O | Monoclinic | — | — |
| Strontiowhitlockite | Sr₉Mg(PO₄)₆(PO₃OH) | — | — | — |
| Strunzite | Mn²⁺Fe₂³⁺(PO₄)₂(OH)₂·8H₂O | — | 4.0 | — |
| Struvite | H₁₆MgNO₁₀P | Orthorhombic | 2.0 | — |
| Struvite-(K) | KMg(PO₄)·6H₂O | — | — | — |
| Studenitsite | NaCa₂[B₉O₁₄(OH)₄] * 2H₂O | Monoclinic | — | — |
| Studtite | [(UO₂)(O₂)(H₂O)₂] * H₂O | — | — | — |
| Stumpflite | PtSb | Hexagonal | 5.0 | — |
| Stunorthropite | (NH₄)₄[Mo₂O₆(MoO₄)₂] | Triclinic | — | — |
| Sturmanite | Ca₆Fe³⁺₂(SO₄)₂.₅[B(OH)₄](OH)₁₂·25H₂O | Trigonal | 2.5 | — |
| Stöfflerite | CaAl₂Si₂O₈ | Tetragonal | — | — |
| Stützite | — | Hexagonal | — | — |
| Suanite | Mg₂[B₂O₅] | Monoclinic | — | — |
| Sudburyite | PdSb | Hexagonal | — | 9.18 g/cm³ |
| Sudoite | Mg₂Al₃(Si₃Al)O₁₀(OH)₈ | — | — | — |
| Sudovikovite | PtSe₂ | Trigonal | — | 8.42 g/cm³ |
| Suenoite | — | Orthorhombic | — | — |
| Suessite | (Fe,Ni)₃Si | Cubic | — | — |
| Sugakiite | Cu(Fe,Ni)₈S₈ | Tetragonal | — | — |
| Sugarwhiteite | Pb₂Te₅O₁₂ | Monoclinic | — | — |
| Sugilite | K(Na,☐)₂Li₃(Fe,Mn,Al,Zr)₂[Si₁₂O₃₀] | Hexagonal | — | — |
| Suhailite | (NH₄)Fe²⁺₃(Si₃Al)O₁₀(OH)₂ | Monoclinic | 2.5 | — |
| Sulfatoredmondite | — | Monoclinic | — | — |
| Sulfhydrylbystrite | Na₅K₂Ca[Al₆Si₆O₂₄](S₅)²⁻(SH)⁻ | Trigonal | — | — |
| Sulfoborite | Mg₃[B(OH)₄]₂(SO₄)(OH,F)₂ | Orthorhombic | — | — |
| Sulfopadmaite | PdBiS | Cubic | — | — |
| Sulphohalite | Na₆(SO₄)₂FCl | Cubic | — | — |
| Sulphotsumoite | Bi₃Te₂S | — | — | — |
| Sulphur | S | Orthorhombic | — | — |
| Sulvanite | Cu₃VS₄ | Cubic | 3.5 | 3.97 g/cm³ |
| Sundiusite | Pb₁₀(SO₄)O₈Cl₂ | Monoclinic | — | — |
| Sunshuite | FeBi₂S₄ | Monoclinic | — | — |
| Suolunite | Ca₂Si₂O₅(OH)₂(H₂O) | Orthorhombic | — | — |
| Suredaite | PbSnS₃ | Orthorhombic | — | — |
| Surinamite | Mg₃Al₃O[Si₃BeAlO₁₅] | — | — | — |
| Surite | (Pb,Ca)₃(Al,Fe²⁺,Mg)₂((Si,Al)₄O₁₀)(CO₃)₂(OH)₂ | — | — | — |
| Surkhobite | KBa₃Ca₂Na₂Mn₁₆Ti₈(Si₂O₇)₈O₈(OH)₄(F,O,OH)₈ | Monoclinic | — | — |
| Sursassite | Mn²⁺₂Al₃(SiO₄)(Si₂O₇)(OH)₃ | Monoclinic | — | — |
| Susannite | Pb₄(SO₄)(CO₃)₂(OH)₂ | Trigonal | — | — |
| Suseinargiuite | NaBi(MoO₄)₂ | Tetragonal | — | — |
| Sussexite | Mn²⁺BO₂(OH) | Orthorhombic | — | — |
| Suzukiite | BaVSi₂O₇ | — | — | — |
| Svabite | Ca₅(AsO₄)₃F | Hexagonal | — | 3.59 g/cm³ |
| Svanbergite | SrAl₃(SO₄)(PO₄)(OH)₆ | Trigonal | — | — |
| Sveinbergeite | Ca(Fe²⁺₆Fe³⁺)Ti₂(Si₄O₁₂)₂O₂(OH)₅(H₂O)₄ | Triclinic | — | — |
| Sveite | KAl₇(NO₃)₄(OH)₁₆Cl₂ * 8H₂O | Monoclinic | — | — |
| Sverigeite | NaMnMgSnBe₂(SiO₄)₃(OH) | Orthorhombic | — | — |
| Svetlanaite | SnSe | Orthorhombic | — | 5.80 g/cm³ |
| Svornostite-(K) | K₂Mg[(UO₂)(SO₄)₂]₂·8H₂O | Orthorhombic | — | — |
| Svornostite-(NH₄) | (NH₄)₂Mg(UO₂)₂(SO₄)₄(H₂O)₈ | Orthorhombic | — | — |
| Svyatoslavite | Ca(Al₂Si₂O₈) | Orthorhombic | — | — |
| Svyazhinite | (Mg,Mn²⁺,Ca)(Al,Fe³⁺)(SO₄)₂F * 14H₂O | — | — | — |
| Swaknoite | (NH₄)₂Ca(HPO₄)₂ * H₂O | — | — | — |
| Swamboite-(Nd) | Nd₀.₃₃₃[(UO₂)(SiO₃OH)](H₂O)\\sim₂.₅ | Monoclinic | 2.5 | — |
| Swartzite | MgCa(UO₂)(CO₃)₃ * 12H₂O | Monoclinic | — | — |
| Swedenborgite | NaBe₄Sb⁵⁺O₇ | Hexagonal | — | — |
| Sweetite | Zn(OH)₂ | Orthorhombic | — | 3.20 g/cm³ |
| Swinefordite | Li(Al,Li,Mg)₄((Si,Al)₄O₁₀)₂(OH,F)₄ * nH₂O | — | — | — |
| Switzerite | Mn²⁺₃(PO₄)₂ * 7H₂O | Monoclinic | — | — |
| Sylvanite | AgAuTe₄ | Monoclinic | 1.8 | 8.10 g/cm³ |
| Sylvite | KCl | Cubic | 2.0 | 1.99 g/cm³ |
| Symesite | Pb₁₀(SO₄)O₇Cl₄ * H₂O | — | — | — |
| Symplesite | Fe²⁺₃(AsO₄)₂ * 8H₂O | Triclinic | — | — |
| Synadelphite | Mn²⁺₉(As₅+O₄)₂(As³⁺O₃)(OH)₉ · 2H₂O | — | — | — |
| Synchysite-(Ce) | CaCe(CO₃)₂F | Monoclinic | — | — |
| Synchysite-(Nd) | CaNd(CO₃)₂F | Orthorhombic | — | — |
| Synchysite-(Y) | CaY(CO₃)₂F | Hexagonal | — | — |
| Syngenite | K₂Ca(SO₄)₂·H₂O | Monoclinic | 2.5 | — |
| Szaibélyite | MgBO₂(OH) | Monoclinic | — | 2.66 g/cm³ |
| Szenicsite | Cu₃MoO₄(OH)₄ | Orthorhombic | — | — |
| Szilagyiite | NaCa₃(UO₂)(CO₃)₃(SeO₃)F(H₂O)₆ | Trigonal | — | — |
| Szklaryite | ☐Al₆BAs³⁺₃O₁₅ | Orthorhombic | — | — |
| Szmikite | Mn(SO₄)(H₂O) | Monoclinic | — | — |
| Szomolnokite | Fe²⁺SO₄·H₂O | Monoclinic | — | — |
| Szymańskiite | — | Hexagonal | — | — |
| Söhngeite | — | — | — | — |
| Sørensenite | — | — | — | — |
| Škáchaite | CaCo(CO₃)₂ | Trigonal | — | — |
| Šreinite | Pb(UO₂)₄(BiO)₃(PO₄)₂(OH)₇·4H₂O | — | — | — |
| Štěpite | U(AsO₃OH)₂·4H₂O | Tetragonal | — | — |
| Švenekite | — | — | 2.0 | — |