Mica, Limestone other NonMetallic Minerals in India ...
Limestone deposits are of sedimentary origin and exist in all the geological sequences from PreCambrian to Recent except in Gondwana. 75 per cent Limestone is used in cement industry, 16 per cent in iron and steel industry [It acts as flux] and 4 per cent in the chemical industries. Rest of the limestone is used in paper, sugar, fertilizers, etc.