Fluorite with Barite and Hydrocarbon inclusions, Bethel Level, Minerva #1 Mine, Minerva Oil Company, Cave-in-Rock District, Southern Illinois Small cabinet 4.5 x 6 x 7.5 cm $350. Online 6/28
Zoned blue and pale yellow fluorite with abundant inclusions of white barite and black hydrocarbon. Note linear oil 'trails' that mark previous boundary between fluorite and barite: dissolved naturally in pocket. Mined circa early 1960s. Entered into Ross C. Lillie database as RCL2702.