Fluorite with Calcite - Minerva #1 Mine, Illinois
Measurements: 6 x 5 x 4 cm. This cluster of fluorite has a glassy luster and a bright yellow color, which is offset by a petroleum inclusion. It has a couple schalenohedral calcites perched on it, and the entire specimen sits on a classic limestone matrix. The surface if the fluorite also features delightful growth hillox, which are at times outlined by the petroleum, which offers a nice contrast to see the details.