Records of the Geological Survey of India, Volume 114, Parts 3-6Government of India, 1982 - Geology Includes the "Annual report of the Geological Survey of India," 1867- |
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Page 77
... stones . The stones should reflect the internal brilliancy . 3. Hardness : Minerals having a hardness above 5 in the Moh's scale can be used . The mine⚫ rals should not show variation in hardness ( eg , kya- nite , opal , etc. ) . 4 ...
... stones . The stones should reflect the internal brilliancy . 3. Hardness : Minerals having a hardness above 5 in the Moh's scale can be used . The mine⚫ rals should not show variation in hardness ( eg , kya- nite , opal , etc. ) . 4 ...
Page 78
... stone : Gems like green quart- zites , staurolite or andalusite cross - stones , agate with crescent bands and carvings from rock crystal , bloodstone , emerald , coral , etc. , are revered as spiritual stones . STYLES OF CUTTING In ...
... stone : Gems like green quart- zites , staurolite or andalusite cross - stones , agate with crescent bands and carvings from rock crystal , bloodstone , emerald , coral , etc. , are revered as spiritual stones . STYLES OF CUTTING In ...
Page 85
... stones like diamond , ruby , sapphire , chrysoberyl , emerald , etc. Some large pieces of dia- mond or ruby can be ... stones and stones with flaws . The chances to get suitable market for poor quality material in the ' grab - lots ' are ...
... stones like diamond , ruby , sapphire , chrysoberyl , emerald , etc. Some large pieces of dia- mond or ruby can be ... stones and stones with flaws . The chances to get suitable market for poor quality material in the ' grab - lots ' are ...
Contents
Impact of Coal mining of the natural landscape in Raniganj | 6 |
Ranganathan | 31 |
Geothermal fields of Ganjam and Puri Districts Orissa | |
Copyright | |
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Andhra Pradesh anorthosite Archaean assemblage associated bands basalt basin bauxite beds biotite carbonate charnockite chert chlorite clay seam coal coalfield cobalt colour conglomerate corundum crystals Deccan Trap deposits district east eastern Eocene evaporite facies flow folds foliation Formation garnet gems gemstones Geol Surv Ind Geological Survey gneiss Gondwana grade grained granite grey Group gypsum hills hornblende India indicate Itwa Sandstone Karnataka Kerala laterite limestone lineament lower Madhya Pradesh mafic magnetite manganese margin metamorphism mica belt mineralisation minerals mining occur ophiolite Orissa Panna Shale pegmatites phyllite plagioclase plain planation surfaces Plate quarries quartz quartzite Quaternary Ramanujam Raniganj ratio regional Rewa river rocks samples sand Sandstone schist schistose sedimentary sediments Shale shear shows Siang sillimanite Simrawal soil spoil dumps sq km structures Survey of India tectonic Tertiary thickness tion trend Upper upto valley Vindhyan Wardha zone