slgwv's photos with the keyword: WO3

A major tungsten producer in California's Sierra Nevada. Still technically just "mothballed," altho it hasn't shipped any WO3 in over a decade. Here's a link to a brief history in the L.A. Times: articles.latimes.com/2000/aug/27/local/me-11113

Another view, showing the scale of the cliffs above the mine. The gray rock is metalimestone that hosted the scheelite mineralization.