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General observations on mica mining
The Cutting sorting and splitting industry
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agglomeratic tuff Alluvium amount Andhra average B. C. Roy beds belt Bhilwara Bihar block mica Bombay borehole braunite calcite calcite veins Calcutta carats cent Chapto colour contain countries Cuttable gem Ujjwal cwts depth diamonds district estimated export feet felspar ferro-manganese ferruginous films Garhan Geological Survey Giridih Gold Coast gondite grade Gudur important inch inclusions India Indian mica Industrial Mattho iron and steel iron-ore Jhiri Kaimur kimberlite Lambo low-grade Madhya Pradesh Madras mainly Majhgawan manganese manganese industry manganese-ore manganese-ore deposits manganiferous material Messrs mica mica industry mica mines miles million tons mineral muscovite Mysore occur Orissa oxide Panna pegmatites phlogopite phosphorus phyllites pipe area Plate psilomelane pyrolusite quality mica quartz quartzites Rajasthan Rattis recent reserves sampling Shaft Samuro sandstone Sandur schists scrap shale Shri splittings supergene surface Survey of India Table thickness Trench tuffaceous United Vishakapatnam