SABUGALITE - Sabugal County, Beira Alta Province, Portugal  T
SAFFLORITE – New Nevada Mine, Batopilas, Chihuahua, Mexico
SAKURAIITE – Ikuno Mine, Ikuno-Machi, Asako-Gun, Hyogo Prefecture, Japan
SAL AMMONIAC - near Ravat, Tien-Shan Mountains, Tajikistan
SALEEITE - Cunha Baixa Mine, Beira Alta Province, Portugal                                 
SALEEITE - East Alligator River, Northern Territory, Australia                             
SALEEITE – Ranger #3 Mine, Northern Territory, Australia
SALESITE – Chuquicamata, Antofagasta Province, Chile
SAMARSKITE-(Y) – (Ampangabeite) – Ampangabe, Madagascar  D, T
SAMARSKITE-(Y) – Ambatofotsikely, Madagascar
SAMARSKITE-(Y) – Black Cloud Pegmatite, South Platte District, Jefferson County, Colorado
SAMARSKITE-(Y) – Field Mine, Crabtree Creek, Spruce Pine District, Mitchell Co., North Carolina
SAMARSKITE-(Y) – Webb Quarry, Micaville, Yancey County, North Carolina
SAMARSKITE-(Y) – White Rock Quarry, Middletown, Middlesex County, Connecticut
SAMARSKITE-(Yb) – Little Patsy Pegmatite, South Platte District, Jefferson Co., Colorado  T 
SAMPLEITE - Chuquicamata Mine, Antofagasta Province, Chile                                 
SAMPLEITE - Lake Boga Granite Quarry, N.W. Victoria, Australia                             
SAMPLEITE - Santa Catalina Mine, Sierra Gorda, Caracoles District, Antofagasta Province, Chile
SANBORNITE - Esquire No. 1 Claim, Rush Creek, Fresno County, California
SANBORNITE - Trumbull Peak, Mariposa County, California  D, T
SANEROITE - Miniera Gambatesa, near Chiavari, Val Graveglia, Liguria, Italy  T                              
SANEROITE - Molinello Mine, near Chiavari, Val Graveglia, Liguria, Italy  T                                 
SANIDINE – Mina de la Pilio, La Cruz, Chihuahua, Mexico  D
SANTABARBARITE (Oxykerchenite) – Kerch Peninsula, Crimea Oblast, Ukraine
SANTACLARAITE - Pennsylvania Mine, Santa Clara County, California  T                       
SAPONITE – Roadside Quarry, An Speireachan, near Tobermory, Island of Mull, Scotland
SAPONITE Var. Griffithite – Griffith Park, Los Angeles County, California  D, T
SAPPHIRINE – Androy Region, Toliara (Tulear) Province, Madagascar
SAPPHIRINE – Betroka District, Horombe Region, Fianarantsoa Province, Madagascar
SARABAUITE - Sarabau Mine, 40 Km SW of Kuching, Sarawak, Malaysia (Borneo)  T              
SARCOPSIDE – Palermo #1 Mine, North Groton, Grafton County, New Hampshire
SARKINITE – Sterling Hill Mine, Ogdensburg, Sussex County, New Jersey  D
SASSOLITE – Mudd Mine, Boron, Kern County, California  D
SASSOLITE – Sulphur Bank Mine, Lake County, California
SASSOLITE - Upper Biddy Mine, near Ryan, Death Valley N.M., Inyo County, California  D
SCAINIITE – Dubrava, Slovakia
SCARBROITE - South Bay, Scarborough, Yorkshire, England  T                                 
SCAWTITE - Crestmore Quarry, Riverside County, California  
SCHMITTERITE - Moctezuma Mine, Moctezuma District, Sonora, Mexico
SCHNEIDERHOHNITE – Corrego do Urucum, Galileia, Minas Gerais, Brazil
SCHNEIDERHOHNITE - Tsumeb, Namibia                                               
SCHODERITE - Fish Creek Range, South of Eureka, Eureka County, Nevada                      
SCHOENFLIESITE – Zlaty Kopec, Erzgebirge, Czech Republic
SCHOEPITE – “A” Group, Inter-River/Green River Area, Emery County, Utah
SCHOEPITE – Krunkelbach Valley Uranium Deposit, Menzenschwand, Schwarzwald, Baden-Wurttemberg, Germany
SCHOEPITE - Lookout No. 22 Claim, Marshall Pass District, Saguache County, Colorado
SCHOLZITE - Hagendorf Sud, Oberpfalz, Bavaria, West Germany                                
SCHOLZITE - Reaphook Hill, near Blinman, S.A., Australia  
SCHOLZITE – Tip Top Mine, Custer County, South Dakota
SCHOONERITE - Palermo Mine, North Groton, New Hampshire
SCHORLOMITE - South of the Gem Mine, San Benito County, California
SCHROCKINGERITE – "C" Group, Inter-River/Green River Area, Emery County, Utah
SCHROCKINGERITE – 7 Mile Canyon, near Moab, Grand County, Utah
SCHROCKINGERITE – Encampment, Carbon County, Wyoming
SCHROCKINGERITE - Hideout Mine, White Canyon District, San Juan County, Utah
SCHROCKINGERITE – Jack Daniels No. 1 Mine, Cameron District, Coconino County, Arizona
SCHROCKINGERITE - Lost Creek, 36 Mi. NNW of Wamsutter, Sweetwater County, Wyoming         
SCHUETTEITE - Silver Cloud Mine, north of Battle Mountain, Lander County, Nevada           
SCHULENBERGITE - Ramsbeck Mine, Dornberg, Sauerland, Germany                                         
SCHUMACHERITE – Pucher Shaft, Richtschacht, Schneeberg, Saxony, Germany  
SCORODITE - Copper Stope, Majuba Hill Mine, Pershing County, Nevada                        
SCORODITE – Gold Hill Mine, Tooele County, Utah
SCORODITE - Mina Ojuela, Mapimi, Durango, Mexico
SCORODITE – Tin Stope, Majuba Hill, Pershing County, Nevada
SCORZALITE – Champion Mine, White Mountains, Inyo County, California
SCORZALITE – Halsjoberg (Horrsjoberg), Torsby, Varmland, Sweden
SCORZALITE – Palermo #1 Mine, North Groton, Grafton County, New Hampshire
SEELIGERITE - San Francisco Mine, Sierra Gorda, Caracoles Dist., Antofagasta Prov., Chile  
SEGNITITE - Kintore Opencut, Broken Hill, New South Wales, Australia  T  
SEIDOZERITE – Seidozero Lake, Murai River Valley, Lovozero Massif, Kola Peninsula, Russia  T
SEKANINAITE - Dolni Bory, near Velke Mezirici, Western Moravia, Czechoslovakia  T          
SELENIUM (native) - Ambrosia Lakes District, near Grants, McKinley County, New Mexico                                        
SELLAITE - Brocks Creek, South of Darwin, Northern Territory, Australia                    
SELLAITE - near Darwin, Northern Territory, Australia                                      
SEMSEYITE – Herja, Maramures District, Romania
SENAITE - Fazenda Guariba, Minas Gerais, Brazil - See CRICHTONITE (Plumbian)                                            
SENARMONTITE – Hamimat, Constantine, Algeria  D, T
SENARMONTITE – near Winnemucca, Humboldt County, Nevada
SENARMONTITE – Tom Moore Mine, Erskine Creek Mining District, Kern County, California
SENEGALITE - Kourou Diakouma (Kouroudiako), Faleme River Basin, Tambacounda Region, Senegal T 
SERPIERITE - Challis, Custer County, Idaho                                                 
SERPIERITE - Serpieri Mine, Laurium, Attica, Greece  T                                     
SHAFRANOVSKITE – Mt. Yukspor, Khibina Massif, Kola Peninsula, Russia
SHATTUCKITE - Navojoa, Sonora, Mexico                                                      
SHATTUCKITE - New Cornelia Mine, Ajo, Pima County, Arizona
SHATTUCKITE - Shattuck Shaft, Bisbee, Cochise County, Arizona  T                           
SHORTITE - Poudrette Quarry, Mont St. Hilaire, Rouville Co., Quebec, Canada                
SHORTITE - Stauffer Mine, Green River, Sweetwater County, Utah
SHUISKITE - Sarany Chromite Deposit, Bisersk, Ural Mountains, Russia                    
SIDERAZOT - Ottaviano, Mt. Vesuvius, Italy  T                                              
SIDERONATRITE - Beowawe Hot Springs, Eureka County, Nevada                                 
SIEGENITE - Magmont Mine, Viburnum Trend Lead Belt, S.E. Missouri                          
SIEGENITE - Sweetwater (Miliken) Mine, Reynolds County, Missouri                           
SIGLOITE – Siglo XX Mine, Llallagua, Potosi, Bolivia  D, T
SILVER (native) – Copper Stope, Majuba Hill, Pershing County, Nevada
SILVER (native) – Tsumeb, Namibia
SILVER Var. Electrum - Double Decker Vein (No. 8 Vein), Engineer Mine, Tagish Lake, Atlin, B.C., Canada
SINCOSITE - Ross Hannibal Mine, Lawrence County, South Dakota
SJOGRENITE – near Litton, Sonoma County, California
SKEMMATITE – Iva, Anderson County, South Carolina  D, T
SKLODOWSKITE - Mashamba West Mine, Shaba Province, Zaire                                   
SKLODOWSKITE - Musonoi Mine, Kolwezi, Shaba Province, Zaire                                
SKLODOWSKITE - Santo Domingo Mine, Santa Eulalia, Chihuahua, Mexico                        
SKLODOWSKITE – Shinkolobwe Mine, Shaba Province, Zaire  D, T
SKLODOWSKITE – Swambo, Shaba Province, Zaire
SKUTTERUDITE - Arhbar Mine, Bou Azzer, Anti-Atlas Mountains, Morocco                       
SKUTTERUDITE Var. Smaltite – Hudson Bay Mine, Cobalt District, Ontario, Canada
SMALTITE – Cobalt, Ontario, Canada – See SKUTTERUDITE Var. Smaltite
SMITHSONITE Var. Herrerite (Cuprosmithsonite) – Tsumeb, Namibia
SMOLIANINOVITE - Dome Rock Copper Mine, Olary Province, S.A., Australia                    
SMRKOVECITE – Smrkovec, Czech. Republic  T
SMYTHITE - Saddleback Basalt, Boron Mine, Boron, Kern County, California  D
SODALITE – Diesse Mine (Diesse Carbonatite), Cochabamba Dept., Bolivia
SODALITE – Dmitriyevka, Mariupol Massif (Oktyabr’skii), Azov Sea Region, Dometsk Oblast, Ukraine
SODALITE – Mt Karnasurt, Lovozero Massif, Kola Peninsula, Russia
SODALITE – Mt. Punkuruain, Lovozero Massif, Kola Peninsula, Russia
SODALITE – Nygard-Arntfeltet, Tvedalen, Norway
SODALITE Var. Hackmanite – Coyote Peak, Humboldt County, California
SODALITE Var. Hackmanite - Kvanefjeld, Ilimaussaq Alkaline Intrusive, Southern Greenland
SODALITE Var. Hackmanite - Mt. Rasvumchorr, Khibiny Massif, Kola Peninsula, Russia       
SODDYITE - Musonoi Mine, Kolwezi, Shaba Province, Zaire                                    
SODDYITE – Shinkolobwe Mine, Katanga Copper Zone, Shaba Province, Zaire
SODDYITE – Swambo, Central Area, Shaba Province, Zaire (Congo)
SODIUM-ZIPPEITE – Delta Mine (Pick Mine), San Rafael District, Emery County, Utah   
SODIUM-ZIPPEITE - Peeth Lode, Geevor Mine, St. Just, Cornwall, England
SOGDIANITE - Dara-I-Pioz Massif, Altai Range, Southern Tien-Shan, Tadzhikistan
SONORAITE - Joe Shaft, near Tombstone, Cochise County, Arizona                             
SONORAITE – Moctezuma Mine, Moctezuma District, Sonora, Mexico  T
SORBYITE - Lucky Strike Mine, near Candelaria, Mineral County, Nevada                      
SPADAITE - Alvarado Mine, Gold Hill, Tooele County, Utah  D
SPANGOLITE – 5th Level, Southwest Mine, Bisbee, Cochise County, Arizona                               
SPANGOLITE - Blanchard Mine, near Bingham, Hansonburg District, Socorro County, New Mexico
SPANGOLITE - Copper Stope, Majuba Hill, Pershing County, Nevada                            
SPANGOLITE - Fontana Rossa, Agonisha, Corsica Island (Mediterranean Sea)  
SPANGOLITE - Mason Pass, Lyon County, Nevada                  
SPANGOLITE – Miler Mine, Majuba Hill, Pershing County, Nevada
SPERRYLITE - Vermilion Mine, Sudbury, Ontario, Canada  D, T                                
SPHAEROCOBALTITE    - Bou Azzer, Anti Atlas Mountains, Morocco
SPHALERITE Var. Gumucionite - Llallagua, Potosi, Bolivia  T                                
SPHALERITE Var. Schalenblende – Polmourkany Mine, Kolchoz, Poland                                            
SPINEL Var. Ceylonite – Commercial Quarry, Crestmore, Riverside County, California
SPIONKOPITE - Yarrow Creek, SW Alberta, Canada  T                                          
SPIROFFITE – Moctezuma Mine, Moctezuma District, Sonora, Mexico
STANNITE – Cinwald (Zinnwald), Bohemia, Czech Republic
STANNITE - Renison Bell Mine, near Zeehan, Tasmania, Australia                                              
STANNITE - San Jose Mine, Dept. of Oruro, Bolivia
STEACYITE - Chara River Area, Murun Massif, N.W. Aldan, Siberia, Russia
STEACYITE – DeMix Quarry, Mont St. Hilaire, Rouville County, Quebec, Canada  D, T
STEACYITE - Mont St. Hilaire, Rouville County, Quebec, Canada   T
STEENSTRUPINE-(Ce) - Mt. Umbozera, Lovozero Massif, Kola Peninsula, Russia
STELLERITE - Ritter Hot Springs, Grant County, Oregon                                      
STEWARTITE – Benjamin Hill, 90 Miles South of Nogales, Sonora, Mexico
STEWARTITE - Fletcher Mine, North Groton, Grafton County, New Hampshire, Collected by J. Parnau 1974
STEWARTITE – Stewart Mine, Pala District, San Diego County, California   D, T
STIBARSEN - Rio Moctezuma, Municipio de Moctezuma, Sonora, Mexico                                             
STIBARSEN - Trebsco, Bohemia, Czechoslovakia                                               
STIBIOTANTALITE – Himalaya Mine, Mesa Grande, San Diego County,  California
STICHTITE - Kaapsche Hoop, Barberton District, Republic of South Africa  D                 
STICHTITE - Stichtite Hill, Dundas, Tasmania, Australia  T
STICHTITE – Tunnel Hill Asbestos Mine, Zeehan, Tasmania, Australia
STILBITE-(Ca) – Skookumchuck Dam, near Bucoda, Thurston County, Washington
STILLWELLITE-(Ce) – Dara-I-Pioz Massif, Altai Range, Southern Tien Shan, Tadzhikistan  D
STISHOVITE - Meteor Crater, Coconino County, Arizona  T                                    
STOKESITE - Corrego du Urucum, near Galileia, Governador Valadares, M. G., Brazil          
STOLZITE - Abuja, Niger Province, Northern Nigeria  D                                      
STOLZITE - Cordillera Mine, near Cordillera, New South Wales, Australia                    
STOLZITE – Kara Mine, Hampshire, Tasmania, Australia
STOLZITE - Proprietary Mine, Broken Hill, New South Wales, Australia                       
STOLZITE - Zinnwald, Bohemia, Czechoslovakia                                               
STRACZEKITE - Union Carbide Vanadium Mine, Wilson Springs, Garland County, Arkansas  T     
STRASHIMIRITE - Burrus Mine, Washoe County, Nevada                                         
STRASHIMIRITE - Copper Stope, Majuba Hill Mine, Pershing County, Nevada                    
STRENGITE – Boa Vista Mine, Galileia, Minas Gerais, Brazil
STRENGITE – Hagendorf, Oberpfalz, Bavaria, Germany
STRENGITE - Mina Arkansas, Polk County, Arkansas                                           
STRENGITE – Pack Rat Mine, near Boulevard, San Diego County, California
STRENGITE – Stewart Mine, Pala District, San Diego County, California
STRIGOVITE - Strezgom (Streigau), Wojew. Wroclaw, Poland - See CHLORITE  D, T              
STRINGHAMITE - Christmas Mine, near Hayden, Gila County, Arizona                           
STROMEYERITE - Magma Mine, near Superior, Pinal County, Arizona  D                            
STROMEYERITE - Vrancice, near Pribram, Bohemia, Czechoslovakia - See MCKINSTRYITE
STRONTIOGINORITE – Kern Borate Mine (Tenneco Open Pit), near Ryan, DVNM, Inyo Co., California
STRONTIOJOAQUINITE - Junnila Mine, New Idria District, Southern San Benito County, California
STRONTIOJOAQUINITE - Mina Numero Uno, Southern San Benito County, California  T            
STRONTIOJOAQUINITE - Victor Mine, Clear Creek District, So. San Benito County, California           
STRONTIO-ORTHOJOAQUINITE – Benitoite Gem Mine, Southern San Benito County, California  D
STRONTIUM-APATITE - Lovozero Massif, Kola Peninsula, Russia
STRONTIUM-APATITE – Mina Numero Uno, Southern San Benito County, California
STRONTIUM-APATITE - Victor Mine, Clear Creek District, Southern San Benito County, California
STRUNZITE - Hagendorf Sud, Hessen, Bavaria, Germany                                        
STURMANITE - N'Chwaning II Mine, No. Cape Prov., Republic of South Africa  T               
STUTZITE - Bambollita Mine, Moctezuma District, Sonora, Mexico
SUGILITE - Iwagi Islet, Ehime Prefecture, Southwest Japan  T                               
SUGILITE - Wessels Mine, No. Cape Province, Republic of South Africa                       
SULVANITE - Edelweiss Mine, Burra-Burra District, S.A., Australia  T                       
SUNDUISITE – Langban, Varmland, Sweden
SUOLUNITE - Al Khawd, 35 Km West of Muscat, Oman                                           
SURSASSITE - Strategic Manganese Mine, near Woodstock, New Brunswick, Canada               
SVABITE - Langban Mines, Langban, Varmland, Sweden                                         
SVABITE – Ultevis, Lappland, Sweden
SVANBERGITE – Dover Mine, near Hawthorne, Mineral County, Nevada
SVANBERGITE – Mt. Brussilof Mine, Radium, British Columbia, Canada
SWEDENBORGITE – Langban, Varmland, Sweden
SWINEFORDITE - Foote Mineral Company Mine, Kings Mountain, North Carolina  T               
SWITZERITE - Foote Mineral Company Mine, Kings Mountain, North Carolina - See METASWITZERITE                    
SWITZERITE – Tip Top Mine, Custer County, South Dakota
SYLVANITE - Cripple Creek, Teller County, Colorado  D
SYLVITE - Bismarckshall Mine, Bischofferode, Kreis Worbis, Thuringia, Germany
SYLVITE – Salton Sea, Imperial County, California
SYNCHYSITE-(Ce) - Cherbadung Mountain (Pizzo Cervandone), Valais, Switzerland
SYNCHYSITE-(Ce) - Holmestrand, Vestfold, So. Norway                                        
SYNCHYSITE-(Ce) - Pizzo Rotondo, Val Bedretto, Canton Ticino, Switzerland
SYNCHYSITE-(Y) (Doverite) - Scrub Oaks Mine, Dover, Morris County, New Jersey  D, T        
SZAIBELYITE – Blind Mountain, Pioche, Lincoln County, Nevada
SZAIBELYITE - Bou Azzer, Anti-Atlas Mountains, Morocco
SZAIBELYITE - Bryson Roadcut, Hwy. 8, East of Bryson, Quebec, Canada
SZAIBELYITE - Stinson Beach, Marin County, California                                      
SZAIBELYITE - West Spring, Beaver Lake Mountains, Utah                                     
SZENICSITE - Jardinera No. 1 Mine, Inca del Oro, N. of Copiapo, Atacama Province, Chile  D, T  
SZOMOLMOKITE – Lavender Pit, Bisbee, Cochise County, Arizona
SZOMOLNOKITE – Lavender Pit, Bisbee, Cochise County, Arizona