Lengenbachite & Dufrenoysite

Lengenbach Quarry, Im Feld, Binn Valley, Wallis, Switzerland

Lengenbachite is a very rare Ag-Cu-Pb-As bearing sulfosalt, forrms dark grey/black lath like microcrystals with grey metallic fibrous dufrenoysite and red realgar, on sugary dolomite matrix

 The specimen size 1.8cm x 1.7cm x 1.1cm 

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I’m a professional geologist/mineralogist, with analytical background. Many of my minerals were checked by x-ray diffraction and energy dispersive spectrometry. Some of my specimens comes with the documentation of the analysises.

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