Formula: Fe²⁺Al₂(PO₄)₂(OH)₂6H₂O       Hardness: 3,5

Vauxite is a phosphate mineral and belongs to the laueite – paravauxite group, paravauxite subgroup, although Mindat puts it as a member of the vantasselite Al₄(PO₄)₃(OH)₃·9H₂O group. There is no similarity in structure between vauxite and paravauxite Fe²⁺Al₂(PO₄)₂(OH)₂·8H₂O or metavauxite Fe³⁺Al₂(PO₄)₂(OH)₂·8H₂O, even though they are closely similar chemically, and all minerals occur together as secondary minerals. Vauxite was named in 1922 for George Vaux Junior (1863–1927), an American attorney and mineral collector.