A Glossary of MineralogyLongman, Green, Longman, and Roberts, 1861 - 420 страници |
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Страница xii
... prism , and the octahedron with a square base , belong to this system . In the first the axes connect the centres of opposite faces , and are at right angles to one another . In the octahedron with a square base , which bears the same ...
... prism , and the octahedron with a square base , belong to this system . In the first the axes connect the centres of opposite faces , and are at right angles to one another . In the octahedron with a square base , which bears the same ...
Страница xiii
... prisms . In the first the axes connect the centres of opposite faces . In the second the vertical axis connects the ... prism . 6. Hexagonal , or Rhombohedral . - In this system there are three equal lateral axes , intersecting at an ...
... prisms . In the first the axes connect the centres of opposite faces . In the second the vertical axis connects the ... prism . 6. Hexagonal , or Rhombohedral . - In this system there are three equal lateral axes , intersecting at an ...
Страница xxvi
... prisms , while Pyroxene has commonly four - sided prisms . They both vary in colour , from white to black through grass - green and olive - green shades . Both are distinctly cleavable , with the exception of Epidote , which has no very ...
... prisms , while Pyroxene has commonly four - sided prisms . They both vary in colour , from white to black through grass - green and olive - green shades . Both are distinctly cleavable , with the exception of Epidote , which has no very ...
Страница 3
... prism . Oc- curs in oblique rhombic prisms , terminated by four - sided pyramids , which are generally striated and imperfect . Colour nearly black , inclining to brownish - yellow when translu- cent . Opaque or translucent only at thin ...
... prism . Oc- curs in oblique rhombic prisms , terminated by four - sided pyramids , which are generally striated and imperfect . Colour nearly black , inclining to brownish - yellow when translu- cent . Opaque or translucent only at thin ...
Страница 13
... prisms , which are rough externally and of a greenish - white , a moun- tain- or sea - green colour . Lustre ... prisms , so that only the pyra- midal terminations are separated from each other . For this reason , when broken in the ...
... prisms , which are rough externally and of a greenish - white , a moun- tain- or sea - green colour . Lustre ... prisms , so that only the pyra- midal terminations are separated from each other . For this reason , when broken in the ...
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Alumina Analysis antimony arsenic Barytes BB fuses BB on charcoal Beudant blue Bohemia borax Breithaupt Brit Brittle Brochant brown carbonate cerium cleavage Coal cobalt colourless Comp conchoidal Cornwall Crown 8vo crystals Dana Dufrénoy earthy Felspar fibrous flame Fracture conchoidal Fracture uneven Garnet glass globule granular green grey Haidinger Harz Hausmann Haüy Hornblende Huel intumescence Jameson Kirwan Kobell lead Lime Magnesia Localities Lustre Lustre vitreous M. P. G. Horse-shoe M. P. G. Principal Floor Magnesia manganese masses mineral Mohs muriatic acid name given nickel Nicol nitric acid octahedrons opaque Oxide Oxide of copper pearly Peroxide of iron Phillips Phosphoric acid Potash primary form Protoxide of iron Protoxide of manganese Pyrites Quartz resembling resinous rhombic prism RHOMBOHEDRAL rocks Saxony Silica Silica Alumina Peroxide silver Soda Soluble sometimes SPAR stone Streak white sulphate sulphuric acid Tellurium Titanic acid Topaz translucent transparent variety Wall-case Water Werner yellow yellowish
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