(i) Though several ores contain aluminium, it is from bauxite, that a clay like substance alumina and later aluminium are obtained.
(ii) Bauxite deposits are formed by the decomposition of a wide variety of rocks rich in aluminium silicates.
(iii) Aluminium is an important metal because it combines the strength of metals such as iron with extreme lightness and also with good conductivity and great malleability.