Benstonite on Calcite and Fluorite, Bethel Level, Minerva No. 1 Mine, Minerva Oil Company, Cave-in-Rock District, Southern Illinois, Mined c. 1960's, ex. Roy Smith Collection M966, Medium Cabinet 6.5 x 9.0 x 14.0 cm, $850. Online Dec. 14
Druse of spear point calcite richly covered with epitaxic benstonite on yellow and blue fluorite. The Minerva No. 1 Mine is the premier location for the complex carbonate, benstonite, and this is a prime example. Some localized edge chipping on fluorite. Note: Small repair on side with heavily coated benstonite.