Reich Geschiebe Mine, Imsbach, Winnweiler, Donnersbergkreis, Rhineland-Palatinate, Germany
Unusual elongated pyrite crystals in close association with pyrite with the usual cubic habit in a dolomite vug.
© Hartmut Hensel 2025
Cyan globular aggregates of tyrolite (visual identifcation) with pink erythrite tufts. This is a typical association in Imsbach.
Tiny luzonite crystals deep inside a dolomite vug. The luzonite was visually identified based on EDS analysis of similar crystals from the same locality. In the right part of the vug is some covellite(?)
A small vug covered with erythrite crystals.
Tiny silver wires with some minor malachite and an unknown yellow stuff.
Chalcopyrite crystals (probably a twin) in a dolomite vug. On one face tiny crystals of an unknown black sulfide mineral (maybe tennantite) are epitaxially grown.
Unusual elongated pyrite crystals in a dolomite vug.
Chalcocite crystal (visually identified) with a deep blue tarnish with corroded calcite (left side of image and close to the right crystal face) in a dolomite vug.
Chalcocite crystal (visually identified) with a prismatic habit inside a dolomite vug. The vug was completely filled with calcite which has been removed with dilute formic acid.
Chalcocite crystal (visually identified) inside a dolomite vug. The vug was completely filled with calcite which has been removed with dilute formic acid.
Tiny luzonite crystals covering another copper sulfide mineral (not visible) in a dolomite vug. The luzonite was visually identified based on EDS analysis of similar crystals from the same locality.
Yellow brownish sheaf-like goethite on dolomite. In addition there are some reddish hematite balls.
Partially corroded tennantite crystal group with interesting hollow parts. Another tennantite crystal from the locality could be identified via EDS as tennantite-(Zn) and tennantite-(Fe), depending on where the analysis was done on the crystal. So it can be assumed that here it is either the Zn-rich or the Fe-rich member or consisting of both ...
Tennantite crystal decorated with tiny chalcopyrite (or pyrite?) crystals. The chalcopyrite themselves are stacked along a common crystal axis, but also forming an isometric habit (upper left). Another tennantite crystal from the locality could be identified via EDS as tennantite-(Zn) and tennantite-(Fe), depending on where the analysis was done ...
Tiny erythrite crystals with an unidentified black sulfide.
