Smoky quartz with pink fluorite, Kristallkluft Gerstenegg alpine crystal cleft, Switzerland

View inside the Kristallkluft Gerstenegg, an alpine crystal cleft discovered in 1974 during the construction of a pumped storage hydroelectric facility near Grimsel Pass, Switzerland. Smoky quartz with pink fluorite, average quartz crystal 12 inches long. Preserved by Kraftwerke Oberhasli (KWO) with the assistance of local strahler, Ernst Rufibach.