Very lustrous group of calcite showing three stages of crystallization: 1st stage as light brown scalenohedrons, 2nd stage white overgrowth, 3rd stage very lustrous, transparent prismatic crystals oriented parallel to the c-axis. In excellent condition. Mined circa 1960s. Note specimen may be from one of Ozark-Mahoning's mines in the CIR district. Dr. Perry & Anne Bynum Collection.