“Background field of small, black, very magnetic magnetite crystals with red calcite crystals, colored by hematite and minor pyrite. Collected at the Fairbank railroad bed where pre 1900 Bisbee overburden was used to build the track. Rolf Luetcke specimen and photo. ”

“Background field of small, black, very magnetic magnetite crystals with red calcite crystals, colored by hematite and pyrite. Collected at the Fairbank railroad bed where pre 1900 Bisbee overburden was used to build the track. Rolf Luetcke specimen and photo. ”