Which mineral is the main ore of aluminium?

Bauxite is the principal ore from which aluminium is extracted. It is not a single mineral but a rock mixture dominated by aluminium oxides and hydroxides, especially gibbsite, boehmite, and diaspore. Bauxite forms in tropical and subtropical weathering environments where intense chemical weathering leaches away many other elements. Because aluminium is highly reactive and does not occur naturally as a metal in useful amounts, bauxite is the key raw material for production. The ore is economically important worldwide for transportation, construction, and packaging industries.