Dyscrasite, Stibarsen, Pyrargyrite, Löllingite, Galena
Claus-Friedrich Mine, Beerberg, St Andreasberg, Braunlage, Goslar District, Lower Saxony, Germany
Cross section through a reniform/botryoidal aggregate of stibarsen (rim zones, brown to blue-grey anisotropy rotation tints), and dyscrasite (core zone, light-brown- to blue-grey anisotropy). The rim area is partially encrusted by pyrargyrite (blue-grey anisotropy, masked by red internal reflections), löllingite (brown to blue anisotropy), and ...
© Günter Grundmann, Detmold