51. Which mineral is the primary source of aluminum?
a) Quartz
b) Hematite
c) Bauxite
d) Halite
Answer: c) Bauxite
52. Which mineral is used in the production of cement?
a) Quartz
b) Calcite
c) Feldspar
d) Gypsum
Answer: b) Calcite
53. Which mineral is the most commonly used in jewelry?
a) Quartz
b) Topaz
c) Diamond
d) Gold
Answer: a) Quartz
54. Which mineral is used in the production of glass?
a) Quartz
b) Calcite
c) Halite
d) Gypsum
Answer: a) Quartz
55. Which mineral is used as a natural abrasive?
a) Quartz
b) Corundum
c) Diamond
d) Feldspar
Answer: b) Corundum