Ilvaite is a mineral that is primarily composed of calcium, iron, and manganese. It is a dark, opaque mineral that has a distinct, metallic luster that can be easily identified by geologists and mineralogists. Ilvaite is also known as black tourmaline, manganoan ilvaite, and iron garnet. Other common synonyms for ilvaite include iron black, manganoan amphibole, and ferroaluminotschermakite. Ilvaite can be found in various geological formations, including hydrothermal veins, metamorphic rocks, and skarn deposits. Its unique properties make it a valuable mineral for use in a variety of industrial applications, including construction, metallurgy, and electronics.