Fluorite, Rosiclare Level Minerva #1 Mine, Ozark-Mahoning Company, Cave-in-Rock District, Southern Illinois, Mined ca. 1991-1993, Koster Collection #00024, Miniature 2.2 x 2.5 x 3.0 cm, $250. Online 03/04. SOLD.
Glassy, semi-transparent, richly zoned purple and blue/purple fluorite with no point of attachment. The crystal is shaped like a rectangular block and shows pronounced etching from preferential dissolution of barite. Small, natural etchings on a couple of corners. Excellent condition. Mined ca. 1991-1993. Sam & Ann Koster Collection #00024.