Sphalerite and Fluorite with Barite, Rosiclare Level Minerva #1 Mine, Ozark-Mahoning Company, Cave-in-Rock District, Southern Illinois, Mined c. 1992-1993, Tolonen Collection, Miniature 3.5 x 4.5 x 7.5 cm, $200. Online 1/13.
Glassy luster yellow fluorite with a lustrous rich brown sphalerite crystal approx. 3.3 cm perched in the center. The matrix of the specimen shows a hollow indentation representing preferential barite dissolution. Excellent condition. Tolonen Condition. Mined ca. 1992-1993.