(Schimpach, Wincrange, District de Diekirch, Luxembourg)
Mineralisations in quartz veins and in a former slate quarry near Niederwampach.
Ref:
- http://www.mnhn.lu/naturmusee/doc/Rapport_activites_2006.pdf p.101-108
- http://www.mnhn.lu/recherche/ferrantia/publications/Ferrantia49.pdf