Fluorite with Chalcopyrite, Rosiclare Level North-End Denton Mine, Ozark-Mahoning Company, Harris Creek District, Southern Illinois, Mined ca. 1983, Koster Collection #00154, Miniature 3.5 x 3.5 x 4.5 cm, $60. Online 03/04. SOLD.
Group of zoned light purple and yellow semi-transparent fluorite with associated chalcopyrite. Collected by Ross C. Lillie company geologist on May 9, 1984. First pocket in new orebody. Excellent condition. Note localized internal etching restricted to light purple sections of crystals. Sam & Ann Koster Collection #00154. Entered into Ross C. Lillie database as RCL2587.