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 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 ...