Quartz-Mica Schist
Credit Line: Mineralogical and Geological Museum at Harvard University
Object number: BILLINGS-MW165
DescriptionSchist containing micas (≤ 1 mm). Sample displays a significant amount of crenulations on the surface of the rock. There may have been a large pyrite crystal on the surface at one point. The rock has a square indentation and a pile of gray powder was present on initial inspection.