Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
As blue-grey to lavender-grey fibrous or felted masses, usually with intermixed biotite and chlorite, blanketing the entire pegmatite body at its contact with the schist country rock. While not impressive, this is a good source for samples of the species.
Foote Lithium Co. Mine, Kings Mountain, Cleveland County, North Carolina, USA