California Gold & Gems Maps, Then & Now, Northern Edition By M.L Preston (Author) Fascinating series of 5 maps showing gold and gem locations around Northern California, as well as historical maps with settlements. The first map shows gems and minerals in the northwest, and the historic gold region in 1851. The second map shows gold and gems in the northeast part of northern California, and the Feather and Yuba Rivers. The third map shows gold and gems in the southwest part of Northern California, and the mining districts in 1850. The fourth map shows gold and gems in the southeastern part of the Northern California, and miscellaneous district information. The fifth map shows the Mother Lode mineral belt and mineral districts. ISBN-10 : 0965755894 ISBN-13 : 978-0965755894