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!
Hipper Slag Mill slag locality, Holymoorside, Brampton, North East Derbyshire District, Derbyshire, England, UK