CICERO, Ind. (Hamilton County Reporter) — Dean Caldwell of Cicero has been mining opal and obsidian for six months of the year in Mexico for the last 15 years. Last year, he pulled an opal out of the ...

The country’s only fully operational lithium mine had an air pollution problem, Nevada regulators found. Until the state intervened and held a so-called “enforcement conference” on March 25, the ...