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Ch. 6: Illustrations, Index, Appendix

Ch. 6: Illustrations, Index, Appendix Page of 515 Ch. 6: Illustrations, Index, Appendix Text size:minus plus Restore normal size   Mail page  Print this page
INDEX
459
compact,ib.; the original bed of. 187: loss In cutting, 193; Hindoo division of, 19.5; value, ib.; color, purity, ib. ; de­gree of clearness, ib. ; cut and size, 196; prices of, 197-8; celebrated diamonds, 154.193, 203; the largest known, 208; in Victoria's crown, 211 ; at the Industrial Exhibition, 212.
Diamond grinders, 155.
Dimorphism, 110.
Dmptase, double refraction of, 88.
Disthene (Kyanite, sappare), described, 327.
Ditetragonal, pyramids, 36.
Divelsteene, 156.
Dodecahedrons, subdivided, 22.
Dolomite, double refraction of, 87.
Double facet cut, 165.
Doublets, ISO.
Druses, 71.
Drusy crystals, 56.
Dyakisdodecahedron, 30; sign, 31.
Fluor spar, crystalline forms, 23 21, 25, 56, 63, 65,70; hardness, 78, 80; double re­fraction of, S8; electricity, 99; describ­ed, 333.
Fluorine, test for, 120.
Foil, use of, 169-
Form, primary, 26; semt-tesseral, 28; par­allel semi-tesseral, 30.
Forms of crystalline aggregates, 71.
Fortification agate, 284.
Fracture surfaces, 78.
Fusibility, test minerals as to, 115.
Galena, 23, 24, 56, 63
Garlic, used in repairing gems, 170.
Garnet, 23, 25, 27; hardness of, 80; double refraction of, 88; magnetic, 100; a real gem, 136 ; described, 247 ; varieties, 248 ; Syrian, Bohemian, Ceylonian, Aplome, ib.; precious or almandine, 24S ; coloph-onite, 249 ; allochroite, ib.; grossular, 250; topazolite, ib.; melanite, pyrena-ite, ouwarowite, ib.; the ancient car­buncle, 251.
Gems, 135 ; enumerated, 136; color, grav­ity, and hardness of, ib.; chemical char­acter, 139 ; composition, ib.; artificial production, 140 ; geological character, 145; geographical distribution, 146; di­vision and nomenclature, 147; history of, 148 ; superstitions as to, 149 ; sculp­ture in, 151; grinding, 153; engraving, 167; sawing and drilling, 168; polishing materials, ib.; heightening color of, 169 ; setting, 171; cleaning of, 172; imita­tions, ib,; 1, pastes, ib.; 2, doublets, 180 ; 3, burning, 180; price of, 181; optical use of, 181.
Girasol sapphire, 216; fire opal, 304; adu­larla, 313.
Girdle, in diamonds, what? 161.
Glucina, test of, 123.
Goldstone, a paste, 273.
Goniometers, 58.
Goutte de sang, a spinelle, 228.
Grand mogul diamond, 193, 203.
Granite, described, 396; American varie­ties, 397.
Gray copper ore, 28, 63.
Grossular garnet, 250.
Gypsum crystals, 51, 56, 68, 74; double refraction of, 88 ; satin gypsum, 341 ; al­abaster, ib.
E.
Edingtonate, double refraction of, SS.
Electricity of minerals, 99.
Electro-chemical elements, table of, 105.
Electroscopes, 99.
Elongated brilliant facet cut* 165.
Emerald, hardness of, 80; double refrac­tion. 83; a real gem, 136; the oriental, a sapphire, 216; described, 235; emer;tld proper, ib.; how cut, 237; velue, ib.; remarkable emeralds, 238 ; the Duke of Devonshire's, 239 ; the Brazilian, a tour­maline, 256.
Emery, a common corundum, 224.
Engraving on gems, 167.
Essonite, or cinnamon-stone; hardness of, SO; real gem, 136, 250; described, 253.
Euclase, double refraction of, S7; descrip­tion of, 234.
F.
Faoete, 101.
Fablore, 63.
Felspar, 52, 53, 75; described, 812; com­mon, 815; adularia, 312; murcbtsonite, 314; leclite or hellefliata, couazeranite, ib.; amazon-stone, 315; porphyry, 391; aienete, 893.
Fish-eye (adularla), 313.
Ch. 6: Illustrations, Index, Appendix Page of 515 Ch. 6: Illustrations, Index, Appendix
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