| SAFFLORITE (Cobalt Iron Arsenide) | |
| 0 | SAINFELDITE (Hydrated Calcium Arsenate Hydroxide) |
| SAL_AMMONIAC (Ammonium Chloride) | |
| SAMARSKITE (Yttrium Cerium Uranium Iron Niobium Tantalum Titanium Oxide) | |
| SANBORNITE (Barium Silicate) | |
| 0 | SANDSTONE (a common sedimentary rock) |
| SANIDINE (Potasium Aluminum Silicate) | |
| SAPPHIRE (variety of Corundum- Aluminum Oxide) | |
| 0 | SARD (variety of Quartz - Silicon Oxide) |
| 0 | SARDONYX (variety of Quartz - Silicon Oxide) |
| SARTORITE (Lead Arsenic Sulfide) | |
| SCAPOLITE (Sodium Calcium Aluminum Silicate Chloride Carbonate Sulfate) | |
| SCHEELITE (Calcium Tungstate) | |
| 0 | SCHMITTERITE (Uranyl Tellurite) |
| SCHOLZITE (Hydrated Calcium Zinc Phosphate) | |
| SCHORL (complex Sodium Iron Boro-Aluminum Silicate) | |
| SCHROCKINGERITE (Hydrated Sodium Calcium Uranyl Sulfate Carbonate Fluoride) | |
| SCOLECITE (Hydrated Calcium Aluminum Silicate) | |
| SCORODITE (Hydrated Iron Arsenate) | |
| SCORZALITE (Iron Magnesium Aluminum Phosphate Hydroxide) | |
| 0 | SEDIMENTARY (rocks formed via biochemical, clastic, or evaporative processes) |
| 0 | SELENITE (alternate name for Gypsum) |
| SELENIUM (Se) | |
| SEMSEYITE (Lead Antimony Sulfide) | |
| SENARMONTITE (Antimony Oxide) | |
| SERANDITE (Sodium Manganese Calcium Silicate Hydroxide) | |
| SERPENTINE (Iron Magnesium Nickel Silicate Hydroxide) | |
| SHATTUCKITE (Copper Silicate Hydroxide) | |
| SIDERITE (Iron Carbonate) | |
| * | SILICATES (Class) |
| SILICON (Si) | |
| SILLIMANITE (Aluminum Silicate) | |
| SILVER (Ag) | |
| 0 | SINHALITE (Magnesium Aluminum Borate) |
| 0 | SJOGRENITE (Hydrated Magnesium Iron Carbonate Hydroxide) |
| SKLODOWSKITE (Hydrated Magnesium Uranyl Silicate) | |
| SKUTTERUDITE (Cobalt Arsenide) | |
| SMITHSONITE (Zinc Carbonate) | |
| SMOKY_QUARTZ (variety of Quartz- Silicon Oxide) | |
| SODALITE (Sodium Aluminum Silicate Chloride) | |
| SPANGOLITE (Hydrated Copper Aluminum Sulfate Chloride Hydroxide) | |
| SPERRYLITE (Platinum Arsenide) | |
| SPESSARTINE (Manganese Aluminum Silicate) | |
| SPHAEROCOBALTITE (Cobalt Carbonate) | |
| SPHALERITE (Zinc Iron Sulfide) | |
| SPHENE (Calcium Titanium Silicate) | |
| * | SPINEL (Group) |
| SPINEL (Magnesium Aluminum Oxide) | |
| SPODUMENE (Lithium Aluminum Silicate) | |
| STAUROLITE (Iron Magnesium Zinc Aluminum Silicate Hydroxide) | |
| STELLERITE (Hydrated Calcium Aluminum Silicate) | |
| STEPHANITE (Silver Antimony Sulfide) | |
| STIBARSEN (Antimony Arsenic) | |
| STIBICONITE (Antimony Oxide Hydroxide) | |
| STIBNITE (Antimony Sulfide) | |
| STICHTITE (Hydrated Magnesium Chromium Carbonate Hydroxide) | |
| STILBITE (Hydrated Calcium Aluminum Silicate) | |
| 0 | STISHOVITE (Silicon Dioxide) |
| STRENGITE (Hydrated Iron Phosphate) | |
| STRONTIANITE (Strontium Carbonate) | |
| 0 | STRUNZITE (Calcium Zinc Arsenate Hydroxide) |
| STURMANITE (Hydrated Calcium Iron Aluminum Manganese Sulfate Tetrahydroxoborate Hydroxide) | |
| SUGILITE (Potassium Sodium Lithium Iron Manganese Aluminum Silicate) | |
| * | SULFATES (Class) |
| * | SULFIDES (Class) |
| SULFUR (S) | |
| 0 | SUNSTONE (variety of Oligoclase, Sodium Calcium Aluminum Silicate) |
| SUOLUNITE (Hydrated Calcium Silicate Hydroxide) | |
| 0 | SUSANNITE (Lead Sulfate Carbonate Hydroxide) |
| SUSSEXITE (Manganese Borate Hydroxide) | |
| SVANBERGITE (Strontium Aluminum Phosphate Sulfate Hydroxide) | |
| SYLVANITE (Silver Gold Telluride) | |
| SYLVITE (Potassium Chloride) | |
| SYMPLESITE (Hydrated Iron Arsenate) | |
| SYNCHYSITE (Calcium Cerium Lanthanum Neodymium Yttrium Carbonate Fluoride) |