Sphalerite and Fluorite, Rosiclare Level Minerva #1 Mine, Ozark-Mahoning Company, Cave-in-Rock District, Southern Illinois, Mined ca. 1992, Koster Collection, Miniature 2.5 x 6.0 x 8.0 cm, $125. Online 03/07 SOLD
Plate of richly zoned yellow, purple and blue fluorite with associated lustrous brown sphalerite. Minor cleaves on two crystals. Fine luster and color. Mined ca. 1992. Sam & Ann Koster Collection.