Informatics Publishing Limited

Jayshree Panjikar ¹, H. Chandrashekhar ², M. Muniswamaiah ², Nazeer Ahmed ²

Affiliations
1 Gemmological Institute of Bombay, 29, Gurukul Chambers, 187-189, Mambadevi Road, Bombay-400 002, IN
2 Department of Mines and Geology, Bangalore-560 027, IN

Abstract

The occurrence of corundum in Southern Karnataka is known from a long time in its complex geological environment, especially at the margins of the Clospet pluton. Although the exploitation for corundum has been going on since a long time, no systematic approach was made to study the gemmological characters of the mineral. In this paper the geological and gemmological characters of the gem varieties of corundum from parts of Tumkur and Mysore Districts are described.

Keywords

Gemstones, Corundum, Karnataka.

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H. Chandrashekhar ¹, S. S. Chandrashekharmath ¹, S. N. Ganachari ¹

Affiliations
1 Department of Mines and Geology, Bangalore, IN

Abstract

The estimated evaporation and surface run-off have been used to calculate the effective porosity of laterite and effective fissure porosity of weathered basalt which ranges between 0.50 to 6.04 per cent and from 0.94 to 1.67 per cent respectively.

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