Dig up and uncover minerals just like a real geologist with the National Geographic Mineral Dig . Use the tools provided and carefully excavate the 13 specimens of rock and mineral from the plaster block. Once dug up, display them on the National Geographic stand provided. The Mineral Dig includes a magnifying glass and informative booklet with detailed information on each of the rocks and minerals included in the set. The National Geographic Mineral Dig is a great way to encourage an interest in geology and the Earth.