DILLON, Mont. — Molten granite formed the Pioneer Mountain Range in southwest Montana about 72-million years ago. As the granite cooled, water carried quartz and other minerals through the rocks and ...

Happiness can, of course, come in many forms. For a rockhound — and I know this well, being one — it’s all but guaranteed by time spent patiently probing the ground at a mine somewhere, hoping to ...

Crater of Diamonds State Park in Arkansas is the only state park in the U.S. where you can dig for diamonds and keep them. You'll also be able to find gems like quartz, agate, garnet, and jasper ...

In and around Mount Ida, the identity of the official Arkansas State Mineral can be guessed just by looking around. In fact (pun alert!), the laureate is crystal-clear from billboards and other signs.

BOEKENHOUTHOEK, South Africa—Crouched in the mouth of a hand-dug tunnel here, Linki Mugidi chisels the walls in search of a crystal used by Western wellness practitioners and of the sort promoted by ...

CRYSTAL PARK, Mont. — Molten granite formed the Pioneer Mountain Range in southwest Montana about 72-million years ago. As the granite cooled, water carried quartz and other minerals through the rocks ...