Rock Type: Quartz-pyrite-muscovite hydrothermal breccia
Description: Small domains are ultra fine-grained quartz with muscovite and pyrite. Larger domains are pyrite and fine-grained hydrothermal quartz. Coarse quartz grains with fluid inclusions. Several grains of sylvanite, (Au,Ag)Te4, were found as inclusions in pyrite and chalcopyrite. The rock was studied for its gold-silver potential.