Calcite on Fluorite, Rosiclare Level Minerva #1 Mine, Ozark-Mahoning Company, Cave-in-Rock District, Southern Illinois, Mined c. 1992-1993, Tolonen Collection, Medium Cabinet 5.0 x 9.5 x 10.0 cm, $200. Online 1/13. SOLD.
Mounded group of satiny luster calcite with matrix of brown fluorite and white barite. Typical calcite crystals are 1.5 cm. Very fine specimen from this find. Tolonen Collection. When these first came out there was some question as to the chemical component- Mr. Tolonen had this labeled as "Strontium bearing Calcite". (I am somewhat dubious about this attribution but I suppose anything is possible with Minerva since the later-stage carbonates are paragenetically complex).