Fluorite, Bethel Level, A. L. Davis No. 4 Mine, Ozark-Mahoning Company, Cave-in-Rock District, Southern Illinois, ex. Roy Smith Collection M1261, Miniature 3.0 x 4.3 x 7.0 cm, $450. Online Dec. 12.
Lens-like group of iceberg blue transparent fluorite with localized purple highlights. When I first saw this specimen I knew exactly where it came from by its color, transparency and association with residual clay (now removed). I collected identical material from near the No. 4 adit circa 1980 when I worked for Ozark-Mahoning. The occurrence is unmistakable. A rarity.