Any of a group of mixed carbonate minerals, principally of calcium with iron, magnesium and manganese
In this second excavation the red ore is more largely mixed with the micaceous specular variety, and also includes large rounded blocks of ankerite and angular fragments of rock.
() After the Austrian mineralogist Mathias Joseph Anker (1771-1843) in 1825.Richard V. Gaines, H. Catherine W. Skinner, Eugene E. Foord, Brian Mason, and Abraham Rosenzweig: Dana's new mineralogy, John Wiley & Sons, 1997