Otto Stutzer, German geologist, was awarded a doctoral degree in geology at the University of Tübingen, Germany, in 1904. His thesis dealt with the geology of the neighbourhood of Gundelsheim am Neckar, Würtemberg. His subsequent publications, all in German, included a report on the iron ores of Lapland (1907), a book on geological prospecting and mapping (1919), the geology of coal, graphite, diamonds, sulpher, phosphates and other non-metallic ores (1923), bush life (camping, diseases, hygiene, etc) in Africa and South America (1927), and oil in Europe (1931). By 1931 he was a professor at the famous mining academy in Freiberg, Germany.
Stutzer appears to have visited sub-Saharan Africa, particularly the Katanga region of what is now the Democratic Republic of Congo, but it is not clear when or how many times. He published papers on the occurrence of glacial conglomerates in Katanga, which he correlated with the Dwyka Formation of South Africa (1911, 1913), and on the copper ores and other minerals of the region (1913). Another paper dealt with a graphite-rich gneiss from the hinterland of Lindi, German East Africa (now southern Tanzania).
Several of his papers dealt with the geology and mineralogy of southern Africa: On magmatic segregations of bornite (a sulphide of copper and iron) from Okiep, Namaqualand (Zeitschrift für Praktische Geologie, 1907); discussion of a paper by W. Maucher on the ore deposits at Tsumeb, in northern Namibia (Ibid, 1908); on the copper ores of the Khan mine near Swakopmund, Namibia (Metall und Erz, 1914); recent work on diamondiferous strata (Geologische Rundschau, 1915); and the chrome mine at Selukwe, near Gweru, Zimbabwe (Metall und Erz, 1914). Towards the end of his life he and Fr. Eppier published a substantial book, Die Lagerstätten der Edelsteine und Schmuksteine (The strata of gems and ornamental stones; Berlin, 1935, 567p), dealing with, among others, diamonds in southern Africa.