The Occurrence and Distribution of Corundum in the United StatesU.S. Government Printing Office, 1901 - 98 Seiten |
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abrasive alumina amphibolite andesite associated with peridotite bands basal plane basic magnesian rocks biotite blue Buck Creek cent Chester chlorite Clay County cleaned color considerable contact vein corun corundum deposits Corundum Hill corundum is found corundum localities corundum occurs corundum-bearing Cullasagee cyanite described developed dikes dunite dunite veins east emery deposits enstatite feet feldspar Fork found associated found sparingly garnet gems Geol geological gneiss gravels green chlorite hornblende igneous Jackson County Jour Laurel Creek limestone located Macon County magma magnetite manufacture mica mica-schist miles north mill mine.-This mineral mining Missouri River Mountain nearly nodules norite North Carolina obtained occurrence of corundum open cut percentage of corundum peridotite formation peridotite rocks pink plagioclase quantity quartz-schist rhombohedron rubies sapphires saprolitic saxonite schists serpentine shaft specimens spinel surface syenite Towns County Township tunnel varies vermiculite vicinity vitrified wheel width Yogo