Gahnite 

Silberberg Mine, Bodenmais, Regen District, Lower Bavaria, Bavaria, Germany

Greenish black octahedral micro crystals and crystal fragment of gahnite in matrix

The specimen size 2.3 cm x 1.3 cm x 1.5 cm 

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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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