Records of the Geological Survey of India, Volume 114, Part 5The Survey, 1982 - Earthquakes Vols. 1- include Report of the Geological Survey, 1867- ; v. 32- include Review of the mineral production of India, 1898/1903- ; v. 75 consists of Professional papers, no. 1-16; v. 76 consists of Bulletins of economic minerals. |
From inside the book
Results 1-3 of 13
Page 80
... GEMSTONES It is seen from the preceding chapters that the gemstones can be divided into the following major grades in the order of importance : - 1 ) Facet grade - Transparent and flawless gems . 2 ) Cabochon grade - slightly inferior ...
... GEMSTONES It is seen from the preceding chapters that the gemstones can be divided into the following major grades in the order of importance : - 1 ) Facet grade - Transparent and flawless gems . 2 ) Cabochon grade - slightly inferior ...
Page 85
... gemstones . GRADING , SORTING AND MARKETING OF GEMS The rough gemstones are sorted and graded depending upon the colour , transparency and their perfect development to yield maximum optical effects . Only the gem expert can do the ...
... gemstones . GRADING , SORTING AND MARKETING OF GEMS The rough gemstones are sorted and graded depending upon the colour , transparency and their perfect development to yield maximum optical effects . Only the gem expert can do the ...
Page 88
... gemstones closely compete with the rates quoted in the World Market . It may be men- tioned that a few gemstones like the diamonds from Panna in Madhya Pradesh and Wajrakarur in Andhra Pradesh ; emeralds from Rajasthan and Orissa ; blue ...
... gemstones closely compete with the rates quoted in the World Market . It may be men- tioned that a few gemstones like the diamonds from Panna in Madhya Pradesh and Wajrakarur in Andhra Pradesh ; emeralds from Rajasthan and Orissa ; blue ...
Contents
A genetic model for the Sandur manganese ores RN Mishra | 10 |
A note on the intertrappean stratigraphy of Gandhari Kamareddi and Ramayampet areas Nizamabad 19 | 19 |
On the high grade schistose rocks equivalent to the Sargur schist complex in Kasaragod taluk | 31 |
Copyright | |
5 other sections not shown
Other editions - View all
Common terms and phrases
alteration Andhra Pradesh anorthosite anorthositic rocks apatite Archaean ascomata Attapadi Barakar Formation bauxite bauxite deposits belt biotite borehole Cannanore Cannanore district charnockite Chlorite chrysoberyl clay coal seams coal-sand ratio colour contours corundum Cuddapah Basin diopside emerald Ephesite facies feldspar fibrous quartz foliation fossil gabbro garnet garnetiferous sillimanite gneiss gem tracts gemstones Geol Surv Ind Geological Survey gneiss grains granite granulite green high grade hornblende idiomorphic magnetite crystals Intertrappean bed iolite iron isopach Jour Geol Kabbani Karnataka Kerala Krishna kyanite laterite lignite lineament lithofacies lithological magnetite manganese Margarite massif metamorphism migmatite minerals moonstone Mysore Nair number of coal occur ostiole pegmatite Perinthatta plagioclase planation surfaces pollen pyroxene quartz quartzite Ramanujam ratio map regional ruby samples sand Sandur sapphire Schist sedimentary sediments sillimanite South southern strand plain stratiform stratigraphic Survey of India taluk Tamil Nadu tectonic Tertiary thickness trend upto Warkalli Wynad zircon