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 ...

In short: Two roads in the opal mining town of Lightning Ridge have been partially closed to traffic after mining cavities beneath the surface began to give way. Legacy mining cavities needed to be ...

The remote town of Coober Pedy, Australia, is home to about 2,000 people, many of whom gravitated there to mine opal. The extreme climate of the Outback meant residents had to find creative ways to ...

The state's Natural Resources Minister, Courtney Houssos, said a departmental review found 827 miners in Lightning Ridge and 31 in White Cliffs were granted invalid mining licences. Lightning Ridge ...