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Non-Metallic Minerals

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Non-Metallic Minerals - Lesson Summary

Mica is a non-metallic mineral composed of thin leaves or sheets joined together. Mica is found in many colours, from transparent to black, green, yellow, brown and red. Mica provides excellent electrical insulation with low power-loss even at very high voltages. Mica is used extensively in the electrical and electronics industries. 

The main mica-producing regions in India are the northern Chhota Nagpur Plateau in Jharkhand, Ajmer in Rajasthan and Nellore in Andhra Pradesh. The Koderma, Gaya and Hazaribagh belt in Jharkhand is the largest producer of mica in India. Limestone is a form of sedimentary rock almost entirely composed of calcium carbonate. Limestone is mainly used in smelting iron ore and in the manufacturing of cement.           
Andhra Pradesh is the main limestone-producing state in India, followed by Madhya Pradesh, Rajasthan, Gujarat, Tamil Nadu and others.

Mine workers face serious risks to their health and life. Indiscriminate mining leads to extensive deforestation. Dumping of mining waste results in soil and land degradation and pollution of air and fresh water bodies.

We need stricter laws and implementation of personal and environmental safety regulations to keep mining a safe activity. Usable minerals are only about 1% of the earth’s crust. Minerals are limited and non-renewable resources. Continuous mining starts yielding poor quality ores at much higher cost. We need to conserve our mineral resources. Recycling and reusing material finding suitable substitutes of minerals can help us conserve our mineral resources.


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