It's like panning for gold! Water runs from a wooden water tower through a series of troughs called a sluice. Pour bags of mining "rough" into a screen tray and lower your tray into the trough of water. While you sift and shake the tray, watch as the water washes away the dirt and slowly reveals your treasure. And there's a good assortment of treasures in every bag of mining rough! Choose from Gem & Mineral bags, Fossil bags and Arrowhead bags. After discovering your gems and minerals, use the identification charts to accurately identify exactly what you have found.