Fluorite (etched), Rosiclare Level, Cross-Cut Orebody, Minerva #1 Mine, Ozark-Mahoning Company, Cave-in-Rock District, Southern Illinois, Mined ca. 1991-1993, Koster Collection #00644, Miniature 4.5 x 6.0 x 6.5 cm, $150. Online 03/07. SOLD.
Zoned yellow and light purple fluorite showing pronounced etched features. The center of the fluorie specimen was previously filled with balls of barite that became metastable and dissolved leaving hemispherical 'holes'. Very fine specimen from mining ca. 1991-1993. In excellent condition. Sam & Ann Koster Collection #00644.