Gersdorffite with Calcite, Annabergite

specimen number:
2341374

location:
Ait Ahmane, Zagora, Draa-Tafilalet, Morocco

description:
Semi lustrous sharp metallic silver gray crystals of gersdorffite measuring to 1.1 cm in size on top of a massive calcite matrix with light green annabergite. This is in good condition and quite nice for the species. The specimen comes with a previous label from the collection of Jan Erik Larsen.

Ait Ahmane, situated in the eastern sector of the Bou Azzer-El Graara inlier within the Anti-Atlas belt of Morocco, is a renowned mining locality with operations dating back to the mid-20th century. Geologically, the area is characterized by a Neoproterozoic ophiolitic sequence where serpentinized ultramafic rocks and quartz diorites are heavily faulted and hydrothermally altered. Mineralogically, the district is famous for its complex vein systems that yield cobalt arsenides, native silver, and nickel minerals, alongside striking associated specimens of cobaltian calcite and various secondary phases that attract mineral collectors globally.

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