Calcite and Barite on Fluorite, Spivey Mine, Allied Chemical Company, Southern Illinois, Mined c. 1970's, Holzner Collection #779, Small Cabinet 4.5 x 9.0 x 11.5 cm, $250. Online 8/10.
Richly zoned purple fluorite with associated calcite and barite. Documented specimens from the Spivey Mine are exceedingly rare. This is not because they were rare in the mine but really due to the fact that nobody differentiated them from other mines. I had an early collection of southern Illinois minerals that I sold in the early 1980s. Thee were several Spivey Mine specimens in the lot: fluorite, calcite and barite and in appearance very similar to Denton Mine minerals. Not too surprising since these two mines are quite close geographically. Mined circa 1970s. Holzner collection #779. Entered into Ross C. Lillie database as RCL2731.