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!
Meikle (1989): "Occasionally hematite, as minute micaceous flakes with a lustrous metallic and bright copper colour, is present as a coating uniformly covering the surfaces of glassy, white, analcime crystals. It also occurs as dull, metallic brown-grey botryoids or granular to earthy, reddish coatings in cavities in the tuffaceous rocks, where it is associated with chalcopyrite, chalcocite, and possible bornite."
