Mineral - Rhodonite

Name Rhodonite
Class Silicates
Category Inosilicate
Crystal system Triclinic
Chemical composition Manganese silicate (MnSiO₃), sometimes with iron, magnesium, or calcium
Hardness (Mohs scale) 5.5 to 6.5
Transparency Translucent to opaque
Geographical origin Russia, Australia, Brazil, Madagascar, United States, Sweden