Gems and Precious Stones - Index

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336 PAGB Rock crystal, cutting and carving.............. 319 Rose gold quartz........ 118 Rose quartz.... 107, 120, 262 Rubellite.....72.73.74, 75 Rubies, cape........... 81 Rubies in North Carolina. 46 Rubies, value of cape.... 81 Ruby..........39, 276, 311 Ruin aragonite......... 301 Rutile..............192, 271 Rutilated quartz........ 125 Sacrificial Knives .... 305 Sagenite.......107, 124, 263 Sapphire.. .39, 161,276, 280 Sapphire, Colorado...... 49 Sapphire, largest crystal.. 45 Sapphire, Montana...... 48 Sapphire, Nevada....... 50 Sapphire, North Carolina. 45 Sapphirine quartz....... 107 Sard...............108, 128. Sardonyx.. 108, 130, 132, 264 Satin spar.............. 197 Saxon pearl fisheries, experiments in..........228 Saxon topaz.........66, 107 Scapolite...........160, 270 Schorlomite............ 86 Schorlomite, analysis of.. 85 Scotch topaz........... 107 Selenite................ 197 Semi-opal.............. 144 Sepiolite............... 189 Serpentine.............. 185 Serpentine, analysis of, 187................. 188 Shell beads.............256 Shell heaps containing pearls............... 248 Shells containing pearls.. 213 Shepard collection at Amherst College. (See Collection.) Siberian demantoids..... 148 Siderite................ 107 Silicified corals......... 122 Silicified trees.......... 140 Silicified wood......135, 265 Silicified wood, how formed.............. 135 Silliman collection at Cornell University.... 125, 326 Sioux Falls jasper..,___ 123 Size of fresh-water pearls. 253 Skull inlaid with turquoise 62 Skull of rock crystal.....285 Smaragdite..........44, 150 Smoky quartz... 107, 116, 262 Smoky topaz........... 116 Sodalite............i6o, 270 South African diamonds, 13.................. 33 South Carolina diamonds. 21 Spanish topaz.......... 107 Spear points............ 305	INDEX PAGB Spessartite............. 79 Spessartite, analysis of... 83 Sphaerulite............. 299 Sphene................ 194 Spinel..............50, 259 Spinel, analyses of,...... 52 Spinel, green gannite..... 51 Spinel, properties of..... 50 Spinel, localities of....... 5° Spodumene............ 147 Spodumene, analyses of.. 149 Spodumene, yellow...... 150 Staurolite..........177, 269 Stabilite in quartz....... 126 Stream tin............. 191 Sunstone.......163, 164, 268 Sunstone, analysis....... 164 Tecali Marble........ 283 Theory of formation of beryl................ 88 Theory of formation of silicified wood........ 136 Thetis hair stone........ 126 Thomsonite........181, 271 Thomsonite, analyses of.. 182 Titanic iron............ I94 Titaniferous garnet...... 86 Titanite.......194, 258, 270 Titanite, analyses of.... 194 Topaz..............66, 259 Topaz, analyses of...... 68 Topaz, Brazilian........ 66 Topaz, cut............. 69 Topaz, false............ 107 Topaz, localities of...... 67 Topaz, Oriental......39, 66 Topaz, properties of..... 66 Topaz, Saxon........66, 107 Topaz, Scotch.......... 107 Topaz, smoky.......... 116 Topaz, Spanish......... 107 Torrey, J., collection..159, 196 Touch-stone........107, 135 Tourmaline.........70, 260 Tourmaline, analyses of... 76 Tourmaline, black...... 77 Tourmaline, color of..... 71 Tourmaline, localities of.. 71 Tourmaline, properties of. 70 Trees, agatized......... 132 Trees, silicified.......... 140 Trilobites.............. 330 Trocadéro Museum collection, 285, 286, 298, 299, 300................. 3°5 Turquoise.............. 54 Turquoise, analyses of. 58, 64 Turquoise, artificial coloring of............... 59 Turquoise, cutting and polishing............ 62 Turquoise district....... 60 Turquoise from Mineral Park, Ariz........... 60 Turquoise, localities of... 54 Turquoise masks........ 65	PAGE Turquoise, Mexicans' regard for............. 62 Turquoise mines at Los Cerrillos............. 56 Turquoise mosaics....... 63 Turquoise Mountain..... 55 Turquoise rock, origin of. 57 Turquoise, pseudomorph after apatite.......... 61 Turquoise skulls........ 61 Turquoise, value of...... 63 U. S. National Museum Collection, 33,47,58, 69, 74, 86, 90, 92,104, 115,150,169, 172, 177, 185,215,230, 278,284, 285,287,298, 300, 304, 305. 308, 323........ 328 Unio pearls.. ;......216, 225 Unio pearls in Marriott Mound.............. 227 Uralian emeralds........ 148 Value of Conch Pearls. 236 Valueof fresh-water pearls 231 Value of cape rubies.... 81 Value of pearls from Low- ' er California......223, 224 Value of topaz.......... 69 Value of turquoise....... 63 Vaux, W. S., Col'n, 47, 50, 90. 124, 177. 194, 201, 3²⁶ Venus hair stone........ 124 Vesuvianite............ 155 Virginia diamonds...... 16 Wampum..........233, 248 Wampum, conch shells for.................. 234 Watch jewels.......261, 319 Wernerite.............. 270 White garnet.......258, 261 Wilcox, J. W., collection, 47. S3. 125 ........ 273 Willemite·.............. 154 Williamsite............. 187 Wilsonite.............. 272 Wisconsin diamonds (?).. 35 Wollastonite........153, 260 Wood agate............ 135 Wood opal............. 135 Wood tin.............. 191 Xanthite............. 155 Vale College Collection, 92,171, 185, 326, 328 Yellow spodumene...... 150 Zincite................ 154 Zircon.........103, 258, 259 Zircon, analyses of....... 105 Zircon, localities of...... 103 Zircon, North Carolina... 104 Zoisite................. 157 Zonochlorite........180, 271

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