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!
Japan-law twinning in quartz is unusually common here, many with inclusions of arsenopyrite, pyrrhotite or marcasite, and often coated with crusts of scorodite and pitticite.