California History
Copper is a reddish-brown metal that has been used for thousands of years due to its excellent conductivity and malleability. In the context of economic diversification beyond gold mining, copper emerged as a significant resource in California, especially during the late 19th and early 20th centuries, when new mining techniques and growing industrial demands shifted focus from gold to other minerals. This transition helped diversify California's economy, reducing its dependency on gold alone.
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