Magma Mining Company was formed in 1910 in Superior, Arizona. The company mined copper in Superior through 1996 when the last Magma Mine was closed. I have listed the three Magma Mining Company booths in the World's Smallest Museum. Each contains artifacts of the Magma Mining Company Era. This is Booth 3. This display contains old Magma Mining drill bits, pulleys, etc. used mostly in the 1920's to 1930's. There is also a box of old fire extinguisher balls used to fight underground fires!