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!
Translucent yellow to orange in color, water soluble, and similar in appearance to pascoite, hummerite forms vein fillings with columnar structure parallel to the walls. It also forms a granular crust and efflorescence that coats or cements sandstone in
Hummer Mine, Paradox Valley, Montrose County, Colorado, USA