when was copper discovered date
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when was copper discovered date
date copper was discovered
what date was copper discovered
when was the element copper discovered
how was copper discovered
what country was copper discovered
who first discovered copper
when was copper created
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when was copper made
where was copper first found
the history of copper
the history and discovery of copper element
when was copper discovered date, date copper was discovered, what date was copper discovered, when was the element copper discovered, how was copper discovered, what country was copper discovered, who first discovered copper, when was copper created, when was copper invented, when was copper made, where was copper first found, the history of copper, the history and discovery of copper element
