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!
Crystals to 7cm in the British Museum of Natural History collection, coated by descloizite and small yellow (vanadinite) crystals. Descloizite pseudomorphs after vanadinite are known.
Berg Aukas Mine, Grootfontein Constituency, Otjozondjupa Region, Namibia