Rich ELECTRUM grains within dark gray bands of NAUMANNITE and white QUARTZ (Var: Chalcedony) Knob Hill Mine (Golden Promise Mine), Klondike Mountain, Republic, Republic District, Ferry County, Washington, USA no scale Jim Browne photograph |
Rich ELECTRUM grains within dark gray bands of NAUMANNITE and white QUARTZ (Var: Chalcedony) Knob Hill Mine (Golden Promise Mine), Klondike Mountain, Republic, Republic District, Ferry County, Washington, USA no scale Jim Browne photograph |