41. Hardness of Rocksalt
42. Dolenite, basalt and periodite are comes under
43. Which of the following reserve in least in quantity
44. Process of excavating minerals for use of persons.
45. Hardness measured with the help of a scale
46. Talc is belong to
47. Hypabassal rocks are mixed characteristics of
48. The burning period of raw coal for conversion into hard coke called
49. Plagioclase felspars occurs mostly in
50. Mica splits in only . . . . . . . .
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