Abswurmbachite is a copper manganese silicate mineral ((Cu,Mn<sup>2+</sup>)Mn<sup>3+</sup><sub>6</sub>O<sub>8</sub>SiO<sub>4</sub>). It was first described in 1991 and named after Irmgard Abs-Wurmbach (born 1938), a German mineralogist. It crystallizes in the tetragonal system. Its Mohs scale rating is 6.5 and a specific gravity of 4.96. It has a metallic luster and its color is jet black, with light brown streaks.