Fluorite on Sphalerite and Chalcopyrite, Rosiclare Level Main Orebody Denton Mine, Ozark-Mahoning Company, Harris Creek District, Southern Illinois, Mined ca. 1983, Koster Collection #00668, Miniature 4.5 x 6.0 x 7.0 cm, $150. Online 03/07. SOLD.
Mounded groups of lustrous, rich brown sphalerite in combination with light purple fluorite and abundant iridescent chalcopyrite. Specimen is crystallized to all sides and is in excellent condition. Mined ca. 1983 from the center of the main orebody. Sam & Ann Koster Collection #00668.