Quartz on Fluorite with Sphalerite, attr: Sub-Rosiclare Level Deardorff Mine, Ozark-Mahoning Company, Cave-in-Rock District Southern Illinois, Mined c. 1950s-1960s, Bynum Collection, Miniature 3.5 x 5.0 x 7.8 cm, $350. Online 3/9/15. SOLD.
Distinctive combination of quartz on fluorite with associated sphalerite from the richest ore body in the district. Attributed to the Sub-Rosiclare Level of the Deardorff Mine. Ozark-Mahoning Company, the parent company and principal operator of the deposit, would have mined this piece c. 1950s-1960s. In excellent condition. Dr. Perry and Anne Bynum Collection.