Records of the Geological Survey of India, Volume 76, Parts 9-14Government of India, 1947 - Geology Includes the "Annual report of the Geological Survey of India," 1867- |
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Page 9
... Colour , dark brownish black . Streak , black , Hardness , 6-6.5 . Specific gravity , 4'8 . Braunite is of shallow to deepseated origin . Hausmanite . - Crystalline , tetragonal . Composition , MnO4 , containing 72 per cent . Mn . Colour ...
... Colour , dark brownish black . Streak , black , Hardness , 6-6.5 . Specific gravity , 4'8 . Braunite is of shallow to deepseated origin . Hausmanite . - Crystalline , tetragonal . Composition , MnO4 , containing 72 per cent . Mn . Colour ...
Page 11
... Colour , indigo blue . Hardness , 1.5-2 . Specific gravity , 4.6 . Native copper . - Crystallises in the cubic system . Colour , copper red . Streak , metallic . Ductile and malleable . Hardness , 2.5— 3. Specific gravity , 8.8 ...
... Colour , indigo blue . Hardness , 1.5-2 . Specific gravity , 4.6 . Native copper . - Crystallises in the cubic system . Colour , copper red . Streak , metallic . Ductile and malleable . Hardness , 2.5— 3. Specific gravity , 8.8 ...
Page 7
... colour of silver and at the same time able to resist tarnish . Other uses . Sintered beryllium oxide is very hard and is useful as an abrasive for grinding and polishing hard alloys . The oxide has also been tried in ceramics . A small ...
... colour of silver and at the same time able to resist tarnish . Other uses . Sintered beryllium oxide is very hard and is useful as an abrasive for grinding and polishing hard alloys . The oxide has also been tried in ceramics . A small ...
Contents
GENERAL | 1 |
THE MODE OF OCCURRENCE | 8 |
Indian provincial production of manganese | 12 |
13 other sections not shown
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abrasive albite alloys amount annual average B. C. Roy belt beryl Beryllium Bihar block mica Bombay braunite Brazil built-up mica Calcutta Canada cent Central Provinces chalcocite chalcopyrite cleavage colour condenser films containing copper copper deposits corundum countries crystals deposits occur district dressed mica electrical exports fair stained feet felspar ferromanganese garnet Geol Geological Survey gonditic granite Heavily stained important inches India insulation iron and steel iron-ores J. A. Dunn known Kodarma limestone lode M. S. Krishnan Madras mainly manganese manganese-ore manufacture metal mica industry mica-schists micanite miles million tons Mineral Resources mines muscovite Mysore obtained ore-bodies oxide pegmatites phlogopite plate production psilomelane pyrolusite quality block quality mica quartz Rajputana recent replacement rocks ruby Sandur schists sheet mica silicate Singhbhum sizes smelting South splittings sulphide surface Surv Survey of India Table thickness United vanadium veins world's