Fascinating series of 5 maps showing gold and gem locations around Montana, as well as historical maps with settlements. The first map shows gems and minerals in the northwest, and regional mineral maps. The second map shows gold and gems in the northeast part of Montana, and regional mineral maps. The third map shows gold and gems in the southwest part of the state, and regional mineral maps. The fourth map shows gold and gems in the southeastern part of the state, and information on mining history in the state. The fifth map shows Montana and Idaho in 1891.