How metals are made ?
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Most metals are extracted from ores found in the Earth's crust. Ores are often metal oxides , although sulfide and carbonate ores are also common.
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Producing large quantities of a metal like iron, aluminum, or copper therefore involves two distinct operations: extracting an ore (a deposit consisting usually of a huge amount of useless rock and smaller amounts of useful metals) from a mine or quarry and then refining the ore to get the metals away from their oxides .
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