Bauxite is a Naturally Occurring, Heterogeneous Material Composed Primarily of One or More Aluminum Hydroxide Mineral, Plus Various Mixtures of Silica, Iron Oxide, Titania, Aluminosilicate, and other Impurities in Minor or Trace Amounts. the Principal Aluminum Hydroxide Minerals Found in Varying Proportions with Bauxite are Gibbsite and the Polymorphs Boehmite and Diaspore. Bauxite are Typically Classified According to Their Intended Commercial Application: Abrasive, Cement, Chemical, Metallurgical, Refractory Etc.