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Gold Au with Quartz and Pyrite, Dead River region, Marquette Co., Michigan

Gold Au with Quartz and Pyrite, Dead River region, Marquette Co., Michigan

Gold Au with Quartz, Olinghouse Mine I,. Washoe Co., Nevada

Gold Au with Quartz, detail I, Olinghouse Mine,. Washoe Co., Nevada

Gold Au with Quartz II, Olinghouse Mine,. Washoe Co., Nevada

Gold Au with Quartz III, Olinghouse Mine,. Washoe Co., Nevada

Gold Au with Quartz, detail II, Olinghouse Mine,. Washoe Co., Nevada