Mineral Specimen #4686 Calcite on Sphalerite with minor Chalcopyrite and Fluorite
Cave-In-Rock, Hardin Co., Illinois
Small, white colored, translucent Calcite crystals rest on relatively large dark red/brown colored Sphalerite crystals. The Sphalerite has a high resinous luster and a complex surface. There are also small, brassy colored Chalcopyrite crystals and one small, purple Fluorite on the surface of the Sphalerite.
Condition: Fairly Good
Flaws: There is some bruising on the edges of the Sphalerite crystals.