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.
Translucent to transparent rich yellow diamond with a couple of purple tips and copious inclusions of well formed chalcopyrite. Polishing grade. Weight 44g.