Minerals (Category A)
Bauxite, an aluminium ore, is the world's main source of aluminium. It consists mostly of the minerals gibbsite (Al(OH)3), boehmite (γ-AlO(OH)) and diaspore (α-AlO(OH)), mixed with the two iron oxides goethite and haematite, the clay mineral kaolinite and small amounts of anatase (TiO2) and ilmenite (FeTiO3 or FeO.TiO2). In 1821 the French geologist Pierre Berthier discovered bauxite near the village of Les Baux in Provence, southern France.[ In 1861, French chemist Henri Sainte-Claire Deville named the mineral "bauxite"