Browse an extensive collection of UV-reactive minerals, specialized flashlights, and unique geological souvenirs while learning about the science behind these extraordinary stones. The knowledgeable staff can equip you for your own rockhounding venture or arrange guided hunts along the shoreline, making this a must-visit destination for families, collectors, and anyone curious about Michigan's most luminous natural treasures. Open seasonally beginning May 8, with expanded hours throughout summer and fall.