Fluorite and Sphalerite, Rosiclare Level Minerva #1 Mine, Ozark-Mahoning Company, Cave-in-Rock District, Southern Illinois, Mined ca. 1993, Koster Collection #00061, Miniature 4.5 x 5.0 x 7.0 cm, $250. Online 03/07. SOLD.
Zoned purple, yellow and blue, semi-transparent fluorite on lustrous brown sphalerite. Striking specimen from mining ca. 1993. Small crystal on edge has cleave. Prominent crystal in excellent condition. Sam & Ann Koster Collection #00061. Note etched features along interface of fluorite and sphalerite as distinctive of this ore body.