Fluorite, Rosiclare Level Cross-Cut Orebody, Minerva #1 Mine, Ozark-Mahoning Company, Cave-in-Rock District, Southern Illinois, Mined December 1991, Kalaskie Collection #42-196, Miniature 3.0 x 4.0 x 4.7 cm, $450. Online 11/3
Glassy luster, zoned deep yellow and purple fluorite with localized etched, concentric indentations. The etched areas caused by preferential dissolution of barite. In excellent condition and very fine miniature from advance mining in the Northwest Cross-Cut Orebody in 1992: acquired from North Star Minerals at time of production. Betty Kalaskie Collection #42-196.