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!
Cooper & Stanley (1990): "Recently, in the form of minute sharp bipyramidal crystals of an unusually pale green colour on bayldonite (?) (P. Braithwaite Collection, det. BM(NH): XRD).
Habit:
minute globular patches and aggregates; well-formed but minute crystals; drusy botryoidal aggregates with fibrous structure.
Colour:
yellowish green to dark olive green, greenish brown, brown, reddish brown to dark brown.
