Quartz and Sphalerite, Sub-Rosiclare Level Deardorff Mine, Ozark-Mahoning Company, Cave-in-Rock District, Southern Illinois, Mined ca. 1960s, Holzner Collection #C-369, Miniature 3.5 x 5.0 x 7.5 cm, $200. Online 5/1
Combination of sharp, milky white quartz on brown sphalerite with associated chalcopyrite. A classic specimen from the Deardorff Mine and in excellent condition. Mined circa 1950s-1960s. Ken & Marilee Holzner Collection #C-369.