Sphalerite with Fluorite and Barite, Rosiclare Level, Minerva #1 Mine, Ozark-Mahoning Company, Cave-in-Rock District, Southern Illinois, Mined c. 1992, Ron Roberts Collection UD-28, Small Cabinet 2.5 x 6.0 x 8.0 cm, $65. Online September 14.
Blades of sphalerite with "snow on the roof" barite and associated fluorite. The bizarre form of the sphalerite is the result of inter-growth with barite. The barite later dissolved leaving this unique structure. No point of attachment and in excellent condition. Ex: Harold "Shorty" Millikan Collection of Rosiclare, IL.