Aluminum Oxide has the chemical formula Al2O3, which stands for aluminum and oxygen. It is precisely referred to as aluminum oxide and is the variety of aluminum oxides that occurs most frequently. In addition to being known as alumina, it may also go by the names alkoxide, alkoxide, or alundum depending on its form and use. Aluminum Oxide naturally occurs as the mineral corundum, which has the variants that make up the priceless gemstones ruby and sapphire, in its crystalline polymorphic phase (Al2O3).