A Glossary of Mineralogy |
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Page 16
... Rhombic . Occurs in slight- ly rhombic , four - sided prisms ; also massive , when it is exceedingly tough . Structure lamellar . Colour pearl - grey or flesh - red , sometimes purplish red . Translucent at the edges or opaque . Lustre ...
... Rhombic . Occurs in slight- ly rhombic , four - sided prisms ; also massive , when it is exceedingly tough . Structure lamellar . Colour pearl - grey or flesh - red , sometimes purplish red . Translucent at the edges or opaque . Lustre ...
Page 17
... Rhombic : is a sulphate of lead , occurring in rhombic prisms with dihedral terminations , but the crystals , when short , assume the general form of the octahedron . Colour white , grey , or yellowish ; frequently tinged blue or green ...
... Rhombic : is a sulphate of lead , occurring in rhombic prisms with dihedral terminations , but the crystals , when short , assume the general form of the octahedron . Colour white , grey , or yellowish ; frequently tinged blue or green ...
Page 20
... Rhombic . Oc- curs in foliated masses of a brownish - green colour by reflected light , and leek - green by transmitted light . Transparent in thin laminæ . Lustre weak , Streak white . Feel smooth but not greasy . H. 2.5 . S.G. 2.6 ...
... Rhombic . Oc- curs in foliated masses of a brownish - green colour by reflected light , and leek - green by transmitted light . Transparent in thin laminæ . Lustre weak , Streak white . Feel smooth but not greasy . H. 2.5 . S.G. 2.6 ...
Page 23
... rhombic dodecahedrons , having their planes striated parallel to the shorter diagon- al . Colour deep - brown , or orange - brown . Opaque . Harder than quartz . S.G. 3.44 . Fig . 26 . Localities . The banks of the river Lena , in ...
... rhombic dodecahedrons , having their planes striated parallel to the shorter diagon- al . Colour deep - brown , or orange - brown . Opaque . Harder than quartz . S.G. 3.44 . Fig . 26 . Localities . The banks of the river Lena , in ...
Page 25
... Rhombic . Primary form a right rhombic prism . Occurs in hexa- gonal prisms , very frequently in twin crystals , also in globular , reniform , dendri- tic , and coralloid shapes ; sometimes fibrous and in compact masses . ( See FLOS ...
... Rhombic . Primary form a right rhombic prism . Occurs in hexa- gonal prisms , very frequently in twin crystals , also in globular , reniform , dendri- tic , and coralloid shapes ; sometimes fibrous and in compact masses . ( See FLOS ...
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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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