Product Description

Rock Type:  Hydrothermal quartz breccia

Location:  Columbia

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