Ferrostrunzite  

 Gravel Hill Mine, Perranzauloe, Cornwall, United Kingdom

This is a superb specimen with rare pale coloured acicular ferrostrunzite crystals with olive green beraunite, on gossan matrix

Ex-Stefan Weiß/München specimen, found of june 2015.

The specimen size  3.4 × 1.6 × 1.6 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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