Fluorite, Rosiclare Level, Cross-Cut Orebody, Minerva #1 Mine, Ozark-Mahoning Company, Cave-in-Rock District, Southern Illinois, Mined ca. 1990-1992, Koster Collection #00822, Miniature 3.0 x 5.0 x 9.0 cm, $200. Online 03/07 SOLD
Stacks of transparent, glassy light yellow fluorite with associated chalcopyrite. The specimen was found loose in the pocket as the matrix is recrystallized. The Cross-Cut Orebody trended Northwest/Southeast at nearly right angles to the main NE/SW trend of the main orebody. This section of the mine had copious hydrocarbon and also produced the finest fluorite ever recovered from the district. Trivial little nick on one crystal. Advance mining ca. 1990-1992. Sam & Ann Koster Collection #00822.