Cornelio August Severinus Doelter, Doelter y Cisterich or Cisterich y de la Torre (16 September 1850 – 8 August 1930) was a Caribbean-born Austrian geologist who specialized in chemical mineralogy and petrology, serving as a professor at the Universities of Graz and Vienna. He conducted pioneering experiments in synthetic mineralogy and petrology by melting down rocks and allowing recrystallization of mineral constituents.