A Glossary of MineralogyLongman, Green, Longman, and Roberts, 1861 - 420 páginas |
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Página xi
... appearances of minerals , and with their physical properties . This eye- knowledge ( as it may be termed ) can only be acquired by long and diligent practice , by actual examination and by handling the specimens them- selves , no ...
... appearances of minerals , and with their physical properties . This eye- knowledge ( as it may be termed ) can only be acquired by long and diligent practice , by actual examination and by handling the specimens them- selves , no ...
Página xiv
... appearance of several prismatic colours in rapid succession . Examples of this property are afforded by the Diamond , and în a less degree by the Precious Opal . A Change of Colours is of a somewhat similar nature to the play of colours ...
... appearance of several prismatic colours in rapid succession . Examples of this property are afforded by the Diamond , and în a less degree by the Precious Opal . A Change of Colours is of a somewhat similar nature to the play of colours ...
Página xviii
... appearance in the identification of gems . These mistakes might generally be avoided by ascertaining the specific gravity . The process is very simple , all that is required being an accurately adjusted balance , and care in the use of ...
... appearance in the identification of gems . These mistakes might generally be avoided by ascertaining the specific gravity . The process is very simple , all that is required being an accurately adjusted balance , and care in the use of ...
Página xxiv
... appearance . Borates , when reduced to powder , and heated with sulphuric acid , impart a green colour to the flame , on the addition of alcohol . Sulphides have a metallic lustre , or an unmetallic lustre with a coloured streak ; the ...
... appearance . Borates , when reduced to powder , and heated with sulphuric acid , impart a green colour to the flame , on the addition of alcohol . Sulphides have a metallic lustre , or an unmetallic lustre with a coloured streak ; the ...
Página xxvi
... appearance , and present a smoother surface ; and , when broken longitudinally , the prisms do not show the cleavage - plane and that splintery look which are observable in Pyroxene and Hornblende under similar circumstances . Micaceous ...
... appearance , and present a smoother surface ; and , when broken longitudinally , the prisms do not show the cleavage - plane and that splintery look which are observable in Pyroxene and Hornblende under similar circumstances . Micaceous ...
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Términos y frases comunes
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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