Quartz Fluorite Calcite Black Chalcedony Cluster

Amazing formation of Quartz, Fluorite, Calcite, and Black Chalcedony in a cluster! Weighs approximately 215g. 📖Crystal properties📖: Quartz is one of the most abundant minerals on the earth. It occurs in essentially all mineral environments, and is the crucial constituent of many rocks. It is highly resistant to both mechanical and chemical weathering. It is translucent to transparent, occurs in virtually every color you can think of, and measures 7 on the Mohs scale for hardness. Its chemical composition is SiO2, and its crystal system is hexagonal. Quartz can be found all over the world! 📖Crystal properties📖: Fluorite is a form of calcium fluorid aka composed of calcium and fluorine (CaF2). It belongs to the family of halide minerals, has a cubic appearance and is in isometric crystal system. Sometimes it can be a colorless crystal, but other times it can also be purple, blue, green, yellow, or pink, or other combinations of these colors. Named in 1797 by Carlo Antonio Galeani Napione