Why was aluminium so expensive?
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fact, aluminum became more precious than gold and silver in the 19th century, because it was harder to obtain
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Aluminium is the most abundant (found in large quantities) metal in the Earth’s crust. It is expensive, largely because of the amount of electricity required in the extraction process. Aluminium ore is called bauxite. Aluminium oxide has a very high melting point (over 2000°C) so it would be expensive to melt it
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