Rhyacolite, 261 Riband jasper, 75 Richterite, 251, 253 Riebeckite, 251, 256 Ripidolite, 224 Rock crystal, 73 gypsum, 147 salt, 99 Roepperite, 205 Roscoelite, 218 Rose quartz, 73 Rothkupferkies, 37 Rubellite, 195 Rubicelle, 156 Rubidium, 311 Ruby, 84, 85 cape, 210 copper ore, 88 silver ore, 59 spinel, 156 Rumpfite, 225 Ruthenium, 311 Rutilated quartz, 74 Rutile, 77, 316 Safflorite, 38, 44, 295, 299 Sal ammoniac, 98, 99, 309 Salite, 240 Salmite, 223 Salt, common, 99 regions, 101 rock, 99 Saltpeter, 109, no Chile, 109 Salvadorite, 151 Samarium, 311 Samarskite, 168, 309, 317 Sand, 75 black, 159, 161 green, 220 Sandstone, 75 Sanidine, 261 Saponite, 225, 229 Sapphire, 84, 85 Sarcolite, 271 Sard, 74 Sardonyx, 74 Sarkinite, 174, 308 vSartorite, 57 Sassolite, 91, 296 - Satin spar, 113, 146, 147 Scacchite, 103, 307 Saussurite, 200 Scandium, 312 vScapolite, 269, 270, 294, 298, 314 Schalenblende, 35 Scheelite, 138, 139, 298, 316 Schefferite, 240, 244, 308 Schonite, 153 Schorl, 195 Schorlomite, 211 Schungite, 3, 12, 298 Schwatzite, 62 Scleroclase, 57, 304 Scolecite, 277, 278 Scorodite, 179, 295, 303 Seladonite, 220 Selenite, 146, 147 Selenium, 14, 312 Selensulphur, 14, 312, 315 Seligmannite, 60 Sellaite, 10^, 104, 301, 305 vSenarmontite, 69, 294 332 INDEX vSepiolite, 225, 228, 306 nickel, 229 Sericite, 218 Serpentine, 225, 226, 306 common, 226 fibrous, 226 marble, 226 precious, 226 Seybertite, 222 Siberite, 195 Siderite, HI, 118, 303 Silicates, 183 Silicified wood, 73 Silicious sinter, 90 Silicon, 312 Sillimantite, 188, 293 Silver, 20, 23, 312 glance, 48 native, 23, 312 Simonyite, 153 Sipyllte, 167 Siserskite, 18 Sismondine, 223 Skutterudite, 45, 295, 299 Smaltite, 36, 41, 295, 299 Smithsonite, HI, 117, 297, 317 Smoky quartz, 73 Snow, 67 Soapstone, 227 Soda, 126 alum, 154 niter, 109, 309, 313 Sodalite, 233, 294, 314 Soda-orthoclase, 259, 263, 314 Sodium, 313 Sommervillite, 237 Spatbic iron, 118 Spathiopyrite, 44 Specular iron ore, 86 Specularite, 86 Sperrylite, 38, 42, 295, 310 Spessartite, 208, 210, 308 vSphaerocobaltite, in, 119, 299 Sphalerite, 32, 33, 297, 317 Sphene, 271, 272 Spinel, 155, 156, 293, 303, 306 varieties, 156 Spodumene, 241, 247, 294, 305 Spreustein, 278 Stagmites, 114 Stalactites, 114 Stalagmites, 114 Stannite, 65, 300, 302, 316 Staurolite, 184, 293, 303 Steatite, 227 Steenstrupine, 273, 296 Stelznerite, 144, 300 Stephanite, 63, 294, 313 Stibnite, 30, 294 Stilbite, 281, 283, 314 Stinkstone, 113 Stolzite, 138, 140, 305, 316 Stream tin, 81 Strengite, 179, 303 Strigovite, 225 Striped jasper, 75 Stromeyerite, 47, 50, 300, 312 Strontianite, HI, 121, 314 Struvite, 177, 306, 309 Succinite, 290 Sulfoborite, 164, 296, 316 Sulphates, 131 Sulphides, 29 Sulphohalite, 145, 301, 313 Sulphur, 13, 315 native, 13, 315 Sunstone, 267 Sussexite, 162, 296, 306, 307 Sylvanite, 53, 301, 312, 315 Sylvite, 98, 310 Symplesite, 177, 178, 303 Tabular spar, 244 Tachydrite, 106, 107, 297, 306 Tachyhydrite, 107 Talc, 225, 227, 230, 306 Tantalite, 168, 303, 307, 309 Tantalum, 315 Tapiolite, 168, 307, 309 Tarnowitzite, in, 122, 297, 305 Tasmanite, 291' Tellurite, 68, 315 Tellurium, 14, 15, 315 grpahic, 53 native, 15, 315 Tennantite, 62 INDEX 333 Tenorite, 89,