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 ...

Gem hunting, or rock hounding, is a fascinating hobby that allows people to find rare rocks and stones from amethyst and ...

This story was published in partnership with The Maine Monitor, a nonprofit and nonpartisan news organization. To get regular coverage from the Monitor, sign up for a free Monitor newsletter here. The ...

\Crater of Diamonds State Park in Arkansas is the only finders-keepers diamond mining park in the U.S. So set out and Strike it rich in the hills of Arkansas on your next vacay. With the hope of ...