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Interesting fact of the day. All aluminum has a skin of sapphire. When you cut a piece of aluminum, and expose the pure aluminum to the air it very quickly reacts with the air on the surface forming aluminum oxide, which is identical to lab and natural sapphire, except much more pure.
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Haha, yes, and there's a lot of chemical reactions you can do with it, for example, separating water (you only need water, caustic soda and aluminium).
