Final answer:
Gold was made California's state mineral due to its significant role in the state's historical and economic development.
Step-by-step explanation:
Gold was made California's state mineral because it played a significant role in the state's historical and economic development. It is not the only mineral found in California, but its discovery during the Gold Rush in the mid-19th century led to a massive influx of settlers and the rapid growth of cities like San Francisco. The gold mining industry also contributed heavily to California's economy during that time.
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