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 ...

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.

Add Yahoo as a preferred source to see more of our stories on Google. Western North Carolina is known for its hills full of hidden treasures. From rubies and sapphires to emeralds and gold, the region ...

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 ...