Joachim Lorenz

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Joachim Lorenz (* 1956 in Dettingen ) is a German mineral collector and specialist in the Spessart and its minerals, rocks and fossils. He has published about this - often in communities with others - in a wide variety of magazines.

Joachim Lorenz 2018

Lorenz is a trained machine fitter, industrial foreman and heads safety management with a plant fire brigade in a mechanical engineering company in Offenbach. As a mineralogist and geologist, he is self-taught, carries out mineral diagnostics using powder X-ray diffraction, scanning electron microscopy and determines rocks and their constituents using thin slips. He has lived in Karlstein am Main since he was born .

Lorenz is the first to describe the mineral Sailaufite from the Mitridatite group , a shiny black mineral with type locality in the manganese veins of the rhyolite of Hartkoppe near Sailauf . In 2014 he was one of the first to describe Okruschit (named after Martin Okrusch), in 2012 by Vendidait , in 2016 by Magnesiovoltaite and Riotintoit .

Together with Martin Okrusch and Gerd Geyer, he is co-author of a geological guide to the Spessart and author of a book on minerals and rocks of the Spessart. He also published a conference volume on the green porphyry from Greece and the red porphyry from Egypt; He went to the original quarries to take samples. In 2015 he published an extensive book on the Juchem quarry near Idar-Oberstein. In 2018 a book about the tunnel stream between Laufach and Heigenbrücken was added. In 2018 he traveled to Russia especially to complete a biography on Franz Ludwig von Cancrin .

In 1996 he received the Wilke Prize of the Association of Friends of Mineralogy and Geology eV (VFMG), publisher of the journal Der Aufschluss .


  • with Winfried Weinelt : The basalt of Winzenhohl in the southern crystalline Vorspessart. In: Aufschluss 32, Heidelberg 1981, pp. 25-27
  • with Winfried Weinelt: A new basalt deposit in the southern crystalline Vorspessart. In: Aufschluss 34, Heidelberg 1983, pp. 405-406
  • Hugo Bücking (1851-1932) - a well-known mineralogist from the former mining town of Bieber in Spessart. - Annual reports of the Wetterau Society for all natural history in Hanau, Volume 155 - 157, Pages 121 - 176, 12 figs., Hanau August 30, 2007
  • with Martin Okrusch, Gerd Geyer: Spessart: geological development and structure, rocks and minerals , Borntraeger, Geological Guide Collection 106, 2011
  • with Martin Okrusch, Gerd Geyer, Jürgen Jung, Gerrit Himmelsbach, Carlo Dietl: Spessartsteine, Karlstein: Helga Lorenz Verlag 2010, ISBN 9783000317880
  • with Ralf T. Schmitt & Andreas Völker (2011): Count Georg Cancrin and the history of cancrinite discovery. - Mineralogical Almanac, Volume 16, Issue 2, pp. 24 - 32, 20 figs.
  • The Zechstein dolomite from Alzenau and its minerals. - News from natural science Mus. Aschaffenburg 104 1997, pp. 3-34
  • Sailaufit - the 4th new mineral from the Spessart , news of the natural science museum of the city of Aschaffenburg, Volume 108, 2006, pp. 1–14
  • as editor with the Aschaffenburg Natural Science Association [Hrsg.] (2012): Porphyre.- Mitteilungen des Naturwissenschaftliches Museum Aschaffenburg , Volume 26, 188 p., 228 mostly color illustrations, 3 tabs., Helga Lorenz Verlag, Karlstein.
  • with Gerd Geyer: Quo vadis red sandstone? Undreamt-of pitfalls of nomenclature and stratigraphy in the Spessart , annual reports of the Wetterauische Gesellschaft for the entire natural history of Hanau, volume 163–164, 2014, topic volume Spessart, pp. 33–73
  • with Kay Müssig (Ed.) (2015): Juchem. Agates Druze collectors. The famous quarry near Niederwörresbach in the Idar-Oberstein region .- Messages from the Aschaffenburg Natural Science Museum, Volume 27, 516 pages, 1,504 mostly color illustrations, 12 tabs., Published by the Aschaffenburg Natural Science Association. V., Helga Lorenz Verlag, Karlstein a. Main
  • with Ralf T. Schmitt, & Andreas Völker (2018): The underground manganese and iron ore mine "Heinrich" between Eichenberg and Sailauf in the Spessart - later the "Marga" mine for barite. - P. 483 - 508, 15 figs., 5 tabs., Annual reports and communications of the Upper Rhine Geological Association New Series 100 for the year 2018, pp. 1 - 584, 336 figs., 27 tabs, [E. Schweizerbart´sche Verlagbuchhandlung] Stuttgart.
  • as editor (2018): The tunnels between Laufach and Heigenbrücken. The construction site of the century to bypass the Schwarzkopf Tunnel: geology, mineralogy, history, construction and technology of the new railway tunnel through the Spessarts. - Communications from the Aschaffenburg Natural Science Museum, Volume 29, 458 pp., 1,264 mostly color illustrations, 11 tabs., Aschaffenburg Natural Science Association e. V., Helga Lorenz Verlag, Karlstein a. Main.
  • with Marous M. Abu El-Enen, KA Ali, Volker von Seckendorff, Martin Okrusch, Ulrich Schüssler, Helene Brätz, Ralf T. Schmitt (2018): A new look on Imperial Porphyry - a famous ancient dimension stone from the Eastern Desert of Egypt: Petrogenesis and cultural relevance. - International Journal of Earth Sciences / Geologische Rundschau, Volume 107, No. 7, pp. 393-408

Web links

References and comments

  1. Lorenz, Sailaufit from the Spessart, Lapis, 28, issue 7/8, 2003, p. 77
  2. Sailaufit, Mineralienatlas
  3. Okruschit, Mineralienatlas
  4. ^ Mineralienatlas, Vendidaite
  5. ^ Magnesiovoltaite, Mineralienatlas
  6. ^ Riotintoit, Mineralienatlas