Rich ELECTRUM grains within dark gray bands of NAUMANNITE and white QUARTZ, Knob Hill Mine (Golden Promise Mine), Washington

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