Calcite on Barite and Sphalerite, Rosiclare Level, Minerva #1 Mine, Ozark-Mahoning Company, Cave-in-Rock District, Southern Illinois Miniature 4 x 5 x 7 cm $125. SOLD
Classic combination of golden calcite scalenohedrons on chalky white barite intergrown with brown sphalerite. There were a number of these fine specimens produced from headings rich in barite and sphalerite in the early 1990s. In fact, the drift was terminated because the levels of spar dipped to far below 30%, the normal grade level expected to make ore. Mined in 1994. Very tiny little nick off bigger crystal. Gail Hall Collection RL 94-21.