Which one of the following is a non-metallic mineral?

  • A. Manganese
  • B. Magnesium
  • C. Gypsum
  • D. Bauxite
  • E. None of these

Explanation

Gypsum is hydrated calcium sulfate, a non-metallic mineral used in plaster and cement. Manganese, magnesium and aluminium-bearing bauxite are classified as metallic mineral resources.

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