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 side of a mountain that weighs in at 1,253 ...

SPENCER, Idaho — From Interstate 15, the tiny town passes in a moment, just a blip of brown buildings in the desert. But inside the local stores is a treasure trove. The fire of opals erupts from ...