Aluminium Oxide

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Aluminium Oxide    is also known as    Alumina Corundum is the most common naturally-occurring crystalline form of aluminium oxide. Much less-common rubies and sapphires are gem-quality forms of corundum with their characteristic colors due to trace impurities in the corundum structure. Science & Nature > Chemical Names

Impure Aluminium Oxide    is also known as    Emery Powder Science & Nature > Chemical Names

Al2O3    is    Aluminium Oxide Corundum is the most common naturally-occurring crystalline form of aluminium oxide. Much less-common rubies and sapphires are gem-quality forms of corundum with their characteristic colors due to trace impurities in the corundum structure. Science & Nature > Chemical Formulae