Strontianite with Hydrocarbon, Rosiclare Level, Minerva No. 1 Mine, Ozark-Mahoning Company, Cave-in-Rock District, Southern Illinois, Mined early 1990, ex. Roy Smith Collection, Small Cabinet, 4.0 x 7.0 x 8.0 cm, $250. Online Nov. 21.
An undulating mound of white strontianite locally colored light brown by hydrocarbon infusion. Classic Minerva No 1 Mine specimen. Upon close examination, crystals show curved terminations typical of the species.