 Wilhelm Karl Ritter von Haidinger

Wilhelm Karl Ritter von Haidinger (1795–1871) was an Austrian mineralogist and geologist known for his significant contributions to the field of mineralogy, particularly regarding the study of crystals and minerals. One of his notable achievements includes the identification and description of the mineral "Haidingerite," which is named in his honor. He also played a role in the development of crystallography and contributed to the understanding of the optical properties of minerals.