Fluorite, Rosiclare Level Minerva #1 Mine, Ozark-Mahoning Company, Cave-in-Rock District, Southern Illinois, Mined ca. 1992-1993, Koster Collection, Miniature 3.0 x 4.4 x 5.5 cm, $45. Online 03/04. SOLD.
Group of light blue fluorite crystals with just a hint of purple on the rims. Tiny chip on one of the smaller crystals. Advance mining ca. 1992-1993. Sam & Ann Koster Collection.