Group of reddish purple fluorite on limestone matrix with associated sphalerite.  Specimen has very nice three dimensional presentation and displays really well with the two prominent crystals perched in the center. Dr. London acquired this specimen from the estate of Harry Brown at an auction in Joplin, MO in 1997.  Based on the color of the fluorite and matrix, I would attribute the specimen to one of two localities: The North End of the Denton Mine or the Hill Ledford Mine. Minor edge wear.