A Glossary of Mineralogy |
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Page xii
... Rhombic , Oblique , Anorthic , and Hexagonal or Rhombohedral . * 1. The Cubical System — has three equal axes , intersecting one another at at right angles . Thus , in the cube , the regular octahedron and the rhombic dodecahedron ...
... Rhombic , Oblique , Anorthic , and Hexagonal or Rhombohedral . * 1. The Cubical System — has three equal axes , intersecting one another at at right angles . Thus , in the cube , the regular octahedron and the rhombic dodecahedron ...
Page xvi
... Rhombic and Anorthic Systems , in which the horizontal axes are unequal , there are two axes of double refraction . 2. Polarization has the same relation to crystalline form as double refrac- tion , and is displayed by many minerals ...
... Rhombic and Anorthic Systems , in which the horizontal axes are unequal , there are two axes of double refraction . 2. Polarization has the same relation to crystalline form as double refrac- tion , and is displayed by many minerals ...
Page 3
... Rhombic : primary form an oblique rhombic 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 ...
... Rhombic : primary form an oblique rhombic 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 ...
Page 9
... Rhombic . Primary form a right rhombic prism . Colour snow - white or grey- ish - yellow . Translucent . Lustre vitreous , on surfaces of fracture resinous . Fracture con- choidal , uneven . H. 4 to 4.5 . S.G. 3.65 to 3.7 . Fig . 7 ...
... Rhombic . Primary form a right rhombic prism . Colour snow - white or grey- ish - yellow . Translucent . Lustre vitreous , on surfaces of fracture resinous . Fracture con- choidal , uneven . H. 4 to 4.5 . S.G. 3.65 to 3.7 . Fig . 7 ...
Page 13
... rhombic prisms , which are rough externally and of a greenish - white , a moun- tain- or sea - green colour . Lustre vitreous , in- clining to pearly . Translucent . Streak white . Fracture uneven . H. 6. S.G. 3.0 to 3.11 . Comp ...
... rhombic prisms , which are rough externally and of a greenish - white , a moun- tain- or sea - green colour . Lustre vitreous , in- clining to pearly . Translucent . Streak white . Fracture uneven . H. 6. S.G. 3.0 to 3.11 . Comp ...
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Common terms and phrases
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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