American Bonanza Gold is pleased to announce progress at the 100% owned Copperstone gold mine in Arizona during May 2013. May saw 1,041 ounces of gold produced, a 5% increase in ore grade, improvement in the mill recovery, and a 41% increase in development footage as the focus on providing access to new ore zones continues. Improvements continue into June, with production for the first 16 days of the month totalling
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