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

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

Iron
Mica
Copper
Bauxite
This question was previously asked in
UPSC NDA-2 – 2019
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Minerals are broadly classified into metallic and non-metallic minerals. Metallic minerals contain one or more metallic elements, while non-metallic minerals do not. Iron, Copper, and Bauxite (an ore of aluminum) are metallic minerals. Mica is a silicate mineral that does not contain metallic elements and is classified as a non-metallic mineral.
Metallic minerals are sources of metals (e.g., iron ore, copper ore, bauxite), while non-metallic minerals are used for various purposes other than obtaining metals (e.g., building materials, chemicals, fertilizers, gemstones).
Examples of metallic minerals include hematite, magnetite, bauxite, chalcopyrite, chromite, gold, silver, etc. Examples of non-metallic minerals include mica, limestone, gypsum, dolomite, feldspar, quartz, diamond, coal, petroleum, etc.

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