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!
Since all 'lazurites' are sulfide rich hauynes, we restrict the name Lazurite to the blue mineral in Lapis Lazuli, which is opaque, non fluorescent, ultramarine to midnight blue with a bright blue streak
Habit:
Rhombic dodecahedrons modified with cube and octahedral forms
Colour:
Ultramarine to midnight blue
Luminescent properties:
none,
Quality for species:
Excellent - world class for species or very significant. (!!)
Ladjuar Medam, Sar-e-Sang, Kuran wa Munjan District, Badakhshan, Afghanistan