Fluorite Octahedron with Chalcopyrite, Rosiclare Level attr., Denton Mine, Ozark-Mahoning Company, Harris Creek District, Southern Illinois, Ron Roberts Collection, Miniature, approx. 3.5 cm on edge, 5+ cm point to point, $160. Online September 15.
Zoned purple and yellow octahedron with copious inclusions of elongated chalcopyrite "nails" in locally gemmy interior. Beautiful diamond. Polishing grade. Weight 93.7g.