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Identity HelpPyrite - Kautenbach Mine, Germany

16th Nov 2019 19:20 UTCJonathan Woolley

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Hello all, I recently acquired this pyrite specimen that was labeled as "Kautenbach Mine, Hunsruck, Germany".  The Kautenbach Mine, Kautenbach, Traben-Trarbach, Traben-Trarbach, Bernkastel-Wittlich, Rhineland-Palatinate, Germany does have pyrite listed, but there are no example photos on Mindat, and there do not appear to be any similar examples from the entire region (most photos are micros).  I would like to know if anyone is familiar with the locality and can confirm?  The label is recent (from the dealer from whom I obtained it), although it seemed to be older material, but there are no older labels preserved.

The pyrites are simple pyritohedrons, some bright, but the larger ones have a dull coating or last phase of growth.  There are a few small (microscopic) spherical blobs of a greyish metallic color also on the surface of the largest pyrite.  The matrix is small needle quartz, and the only other minerals associated are small cream or tan colored micro crystals which I suspect to be calcite, siderite, or dolomite. 

Thanks for your help.

16th Nov 2019 19:21 UTCJonathan Woolley

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Another angle on the specimen.

16th Nov 2019 19:22 UTCJonathan Woolley

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Third angle.

16th Nov 2019 19:23 UTCJonathan Woolley

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Back side of matrix.

16th Nov 2019 20:47 UTCUwe Kolitsch Manager

Doesn't look like this is from Kautenbach.
Label mix-up?
How old is the label?

23rd Nov 2019 17:37 UTCJonathan Woolley

Thanks, Uwe.  I am suspicious that this is the case.  I don't think the label can be greater than 10 years old.  But I am still left wondering, because there are no pyrite photos from the locality shown when I follow the link above, so I have no comparative pyrites from Kautenbach.  In your experience might there be relatively close localities from which this piece could have come (perhaps somewhere else in the Hunsruck Mts.)?

23rd Nov 2019 17:44 UTCKevin Conroy Expert

Could this be from Peru?   There's a discussion on the FMF forum about bravoite on pyrite.   Scroll to the bottom for the photo of a Peruvian specimen.   The pyrite looks different than yours, but it also has quartz and a gray outer layer on the pyrite.   

26th Nov 2019 03:41 UTCJonathan Woolley

I think it could easily be from Peru, but wasn't familiar enough with German localities to know if the label had a chance of being correct (or close).  I suppose there could be many worldwide localities with pyritohedral crystals on quartz.  It will have to be labeled as unknown for now.
 
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