Min. [Named by Tschermak, 1874, after Prof. E. Ludwig: see -ITE.] A black fibrous borate of magnesium and iron.
1875. Dana, Min., App. II. 35. Ludwigite occurs altered to limonite.
1887. Mineral. Mag., VII. 43. A. Renard … examines the optical properties of Ludwigite.
