Which of these requires silk as a raw material
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ExplLimestone is not required as raw material for the manufacture of Plaster of Paris. Gypsum is taken as raw material for Plaster of Paris.
Bauxite is an important ore which is used for making aluminium. it is an oxide of aluminium. it is not a specific mineral but a rock consisting mainly of hydrated aluminium oxide, so, aluminium industry uses Bauxite as a raw material.
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