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!
Lill Mine, Černojamské deposit, Březové Hory, Příbram, Příbram District, Central Bohemian Region, Czech Republic