Oregon Gold/Silver Maps and Gems Maps Geology
A collection of 5 large maps covering the entire state of Oregon. These maps show gold and silver prospecting areas, and locations where the following gems and minerals have been found: agate, Apache tears, bloodstone, carnelian, chalcedony, feldspar, fossils, garnet, geodes, jade, jasper, limb casts, nodules, obsidian, opal, petrified wood ...