Toward the end of the 19th and into the center 20th Century Gemstone-cutteries and commercial firms from Idar Oberstein were running a jasper mine in Nunkirchen. The goal of the dismantling was not a multicolored-colored stone, but a white, inconspicuous raw material. This could be teinted with Berlin blue coloured light-genuinly and represented at that time a demand gemstone material, because one could imitate the popular Lapis Lazuli with it.
This blue-colored Jaspis came into the trade in Germany under the name “German Lapis” . In the English-language area it was acted also as “Swiss Lapis”. This place of discovery was for collectors up to the recultivation by the company Wild & Co. in the year 2005 accessible.
more informations are given at:
H. Schmitt” Deutscher Lapis - Der Nunkirchener Jaspis und seine Verwendung” in Lapis 9/ 2009
- the Bergbau-Inventar von Dr.G. Müller