Scanning electron microscope image of a prismatic krettnichite (kr) aggregate associated with manganite (ma) and barian brackebuschite (br) in a vug. The inset is a close-up illustrating the morphology of brackebuschite. (Eur. J. Mineral, 13:146).
Location:
hydrothermal manganite-quartz vein at the historic manganese deposit of Krettnich, Saarland, Germany.