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!
"Linarite forms fan-like aggregates of tiny tabular crystals up to 500 µm, and a light blue color. The mineral is closely associated with cerussite and chalcopyrite. X-ray powder data are similar to these of linarite from the Mammoth mine, Arizona, USA (JCPDS 30-493). Chemical analysis reveals major Cu, Pb and S with low proportions of Cl." (Hatert et al., 2000)