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!
One crystal of anduoite (3 µm in diameter) belongs to a complex polyphase assemblage of PGM comprising sperrylite, hollingworthite and an unnamed sulfarsenide of Rh, Ir, Pd and Ni.