minerals

3. the scientific study of minerals.
6. a place, typically a large, deep pit, from which stone, minerals, or other materials are extracted.
7. refined form of bauxite from which aluminium is obtained.
8. the science that deals with the earth's physical structure and substance, its history, and the processes that act on it.
11. principal lignite reserves.
13. main deposit of Bauxite in India.
14. most popular coal in commercial use.
16. the study of the physical features of the earth.
17. mineral derived from ocean waters.
19. found in the Monazite sands of Kerala

1. an oily flammable bituminous liquid that may vary from almost colorless to black.
2. the extraction of metal from its ore by a process involving heating and melting.
3. ferrous mineral used in the manufacturing of steel.
4. a careful preservation and protection of something especially natural resources.
5. most important deposit of aluminium in India.
9. gulf ideal for tidal energy.
10. most important oil field in Gujarat.
12. known for effective use of wind energy
13. oldest oil-producing state in India.
15. a naturally occurring solid material from which a metal or valuable mineral can be extracted profitably.
16. lustrous mineral used in jewelry.
18. most common source of energy in rural areas.