21. Glaciers are masses of
22. Finger nail scratch upto about hardness of
23. Colour of bauxite
24. The following is not a mineral
25. Colour of Hornblende is
26. Felspars when decomposed yeilds
27. Metals used in electronic industry.
28. The chemical combination of biotite mica
29. In which mineral the iron ore exists?
30. The rocks which are cooled at faster rate, near to surface yeilds no crystals called
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