rodoniit

Rodoniit is a manganese silicate mineral with the chemical formula (Mn,Fe,Mg,Ca)SiO3. It is known for its distinctive pink to reddish-brown color, often interspersed with black veins of manganese oxides. The name "rhodonite" is derived from the Greek word "rhodon," meaning "rose," referring to its characteristic color.

This mineral typically forms in manganese-rich metamorphic rocks, such as schists and gneisses, and can also be found in some igneous rocks and hydrothermal veins. It is often associated with other manganese minerals like pyroxenes, amphiboles, and rhodochrosite. Significant deposits of rhodonite are found in Russia, Australia, Brazil, Canada, Mexico, South Africa, and the United States.

Rhodonite is relatively soft, with a Mohs hardness of 5.5 to 6.5, making it susceptible to scratching. It has a vitreous to greasy luster and a white streak. Due to its attractive color and pattern, rhodonite is often used as a gemstone, particularly for ornamental purposes. It is carved into beads, cabochons, and decorative objects. In Russia, it has been historically used for architectural elements, including columns and decorative panels in buildings. While not widely used industrially, it can be a minor source of manganese.