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.
Beautiful light purple, blue and yellow fluorite diamond with large chalcopyrite inclusions along the interface between the yellow center and blue exterior. Polishing grade. Weight 50g.