Auggen location

A stone that bears the traces of Ice Age hunters, Neolithic miners, and court artists. The site near Auggen in the Markgräflerland region is one of the oldest raw material extraction sites in Germany. Finds such as Gravettian points date its use to 27,000–15,000 BC (Holdermann 1996).
The yellow-red flamed bog iron jasper, a Jurassic chert from secondary deposits, was not only processed in Auggen. Magdalenian stations in Breisgau show up to 60% of its contents in their inventories (Pasda 1994). Individual pieces even reached Neuwied-Gönnersdorf, about 300 km to the north (Floss 1994).
Its significance spanned millennia: In modern times, boron ore jasper was processed into jewelry, pearls and decorative objects in Freiburg, Waldkirch, Prague and Florence - partly for the art chambers of European courts (Metz 1961; Distelberger 1978; Kaiser 2003).
Source: Michael J. Kaiser, The Markgräfler Jasper (2003).