Fluorite Octahedron with Chalcopyrite, Rosiclare Level, Denton Mine, Ozark-Mahoning Company, Harris Creek District, Southern Illinois, Ron Roberts Collection, Miniature approx. 3 cm on edge, 4 cm point to point, $125. Online September 15.
Transparent blue, purple and yellow octahedron with abundant chalcopyrite "nails". Polishing grade. Weight 43g.