Records of the Geological Survey of India, Volume 76, Part 10Geological Survey of India, 1942 - Earthquakes |
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Page 6
... amber , others are brown , or brownish red , wine coloured , dark green and even silvery . Mica used in industry is transparent . The best quality ruby mica is perfectly transparent , even in thicknesses of an inch or more . Owing to ...
... amber , others are brown , or brownish red , wine coloured , dark green and even silvery . Mica used in industry is transparent . The best quality ruby mica is perfectly transparent , even in thicknesses of an inch or more . Owing to ...
Page 15
... amber . Silver amber . Medium amber . Dark amber . In Madagascar , phlogopite is classified : - Silver amber or soft amber . Brown amber or medium amber . Black amber or hard amber . - The Bihar classification is more or less adopted in ...
... amber . Silver amber . Medium amber . Dark amber . In Madagascar , phlogopite is classified : - Silver amber or soft amber . Brown amber or medium amber . Black amber or hard amber . - The Bihar classification is more or less adopted in ...
Page 31
... Amber mica has been produced from time to time . in Travancore , near Neyyoor in the south and Punalur in the middle of the State . The sizes and quality appear to be excellent . Accord- ing to V. Subramanyam1 the deposits are ...
... Amber mica has been produced from time to time . in Travancore , near Neyyoor in the south and Punalur in the middle of the State . The sizes and quality appear to be excellent . Accord- ing to V. Subramanyam1 the deposits are ...
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Common terms and phrases
2nd quality albite amount approximately average Bihar Bihar mica Black dotted Black spotted block and splittings block mica built-up mica Calcutta Canada cleavage condenser films condenser plates countries country rock crude mica dealers diopside district electrical exported block feet felspar Geological Survey Giridih grade granite ground mica Heavily stained 1st high quality mica India Indian mica insulation Intermediate stained J. A. Dunn Kodarma Kodarma Reserved Forest large number larger sizes Lepidolite loose splittings M. S. Krishnan Madagascar Madras mainly manufacture mica belt mica exported mica industry mica mining mica produced mica splittings mica trade mica-schists micanite microcline miles muscovite obtained pegmatites percentage phlogopite potash felspar pyroxenite quality block mica quartz quartz core Rajputana Rajputana mica recent recorded ruby mica schists scrap mica sheet mica Short tons smaller solutions South stained 1st quality stoping Survey of India Table 13 trimmed United uparchalla veins washers