Fluorite Octahedron with Chalcopyrite, Denton Mine, Ozark-Mahoning Company, Harris Creek District, Southern Illinois, Ron Roberts Collection, Miniature approx. 3+ cm on edge, up to 4.5 cm point to point, $125. Online September 15.
Translucent to transparent yellow and light purple octahedron with abundant well-formed chalcopyrite inclusions and included void spaces resembling building blocks. Weight 61g.