The Hahnsche Muehle mill is a closely limited occurrence of nodular agates, which are unusually formed for the artillery range area. The nodules are usually flat and are possessing an outside layer of ferric oxides. The agates are formed usually porcelain-like and remind with their pink color and the fine banding of similar findings from Berschweiler.
It is absolutely forbidden to collect any minerals at this place, because this location is a part of the artillery range area. Militarypolice is controling even this abandoned area regulary.