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 ...

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 ...

Western North Carolina offers several locations for gem mining and exploration. Emerald Village, near Spruce Pine, allows visitors to dig for gems and go underground. Other popular spots in and around ...

Wisconsin moonstones are shimmering blue feldspars created 1.5 billion years ago by volcanic activity. The only place where Wisconsin moonstones are found is in a small niche of Marathon County.