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!
Megacrysts of Magnesiohastingsite (core) surrounded by a dehydrogenated and oxidized rim consisting of Oxo-Magnesio-Hastingsite, similar to the occurence at Deeti volcanic cone
Radersberg quarry, Dreis-Brück, Daun, Vulkaneifel, Rhineland-Palatinate, Germany