3" Pink Manganoan Calcite Formation - Highly Fluorescent!
This is a 3" long formation of manganoan (manganese-bearing) calcite that was collected from the Shizhuyuan Mine in Hunan, China. It features a mixture of scalenohedral and flattened-rhombohedral crystal structure. The faint pink coloration of the calcite can be attributed to manganese impurities, and under both short and long wave UV, the calcite fluoresces a vibrant orange color.
Manganoan calcite, also known as manganocalcite is a pink, manganese rich variety of calcite with a chemical composition of (Ca,Mn)CO3. It crystallizes in a trigonal crystal system and forms rhombohedral or scalenohedral crystals. These crystals tend to display a pink color of which intensity can range anywhere from a pinkish-salmon to a hot pink. Often this variety of calcite will exhibit fluorescent properties.