Calcite on Fluorite, Rosiclare Level Cross-Cut Ore Body, Minerva #1 Mine, Ozark-Mahoning Company, Cave-in-Rock District, Southern Illinois, Mined c. 1990-1991, Tolonen Collection, Miniature 2.6 x 3.0 x 5.7 cm $250. Online 1/15 SOLD
Glassy, transparent fluorite zoned in yellow and purple with abundant chalcopyrite inclusions and pronounced 'etching'. There is a single calcite crystal 0.8 cm perched on one side. The 'etched' sections are from a natural dissolution of barite. Classic Cross-Cut orebody specimen from advance mining ca. 1991-1992. Trivial edge rubs. Tolonen Collection.