Calcite, Cave-in-Rock District, Southern Illinois, Mined c. 1950's, Ron Roberts Collection GRE-2, , Miniature 3.0 x 3.0 x 7.5 cm, $20. Online September 14.
Floater group of drusy creamy white calcite showing localized hydrocarbon inclusions. Historically important miniature from the collection of Ben Clement, Marion, KY. In excellent condition.