Works of "Research Collection"
Place Collected: near Perkins
Place Collected: Allies Mine
Place Collected: Venice Salt Dome
Place Collected: Barber Hill Salt Dome
Place Collected: Wittmannsgereuth Mine
Place Collected: Tumut District
Place Collected: Laytonville Quarry (Longvale Quarry)
Place Collected: Kaliwerk Bischofferode
Place Collected: Moore Creek
Place Collected: Silver King Mine (2)