“Three pieces of massive sphalerite from the Copper Queen Mine in Bisbee. Child photo show fluorescence and pieces are also triboluminescent. Rolf Luetcke specimen and photo.”

“Three pieces of massive sphalerite from the Copper Queen Mine in Bisbee. Child photo show fluorescence. This view is of Long Wave UV light but material fluoresces about the same under all three wavelengths. Rolf Luetcke specimen and photo.”