Sphalerite with Fluorite (Modified) and Calcite, Rosiclare Level Denton Mine, Ozark-Mahoning Company, Harris Creek District, Southern Illinois, Mined c. mid-1980's, G & J Megerle Collection, Small Cabinet, 5.0 x 7.0 x 8.0 cm, $75. Online 1/10.
Nice composition of three major species from the district and in excellent condition. Note modified fluorite cube by dodecahedron: Rare from the district. Brassy chalcopyrite on sphalerite adds good contrast and color. ex: George & Judy Megerle collection.