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Spanish Silver in Arizona

When Spaniards entered what is now Arizona, they encountered diggings made by Opata Indians. The Opata Indians, who now live and mine in the northeastern part of the state of Sonora, Mexico, were one of the few Indian tribes that was...

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Which Coil Should I Use?


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Our Readers Say


Concerning assay comments...

U.S. Dept. of Interior Inspectors in Arizona


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The Bawl Mill


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