Natrodufrénite
La Commanderie mine, Le Temple, Mauléon, Bressuire, Deux-Sèvres, Nouvelle-Aquitaine, France
Nearly black natrodufrénite crystals (originally obtained as "dufrénite", but all such samples turned out to be natrodufrénite according to unpublished SEM-EDS analyses by Vincent Bourgouin).
Collection and photo Stephan Wolfsried.
Sony Alpha 7R ii, bellows, Mitutoyo M Plan 20x, aperture, Raynox DCR-250 retro, Stack-Master linear actor, ...
© Stephan Wolfsried 1/2017