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Identity HelpPale blue crystals

20th Mar 2018 16:02 UTCDouglas Merson 🌟 Expert

Pale blue crystals

This specimen is from the Friedrichssegen Mine, Frucht, Bad Ems District, Lahn Valley, Rhineland-Palatinate, Germany. The matrix is primarily pyrite. The field of view is 1.1mm so the crystals are too small to get a hardness on. I have not been able to match it to mineral and was wondering if anyone has any ideas.

20th Mar 2018 17:29 UTCKevin Conroy Manager

The crystals look a bit rounded as if they may be soluble. Perhaps something like chalcanthite or cuprian melanterite?

20th Mar 2018 17:49 UTCUwe Kolitsch Manager

I fully agree with Kevin.

20th Mar 2018 23:27 UTCPaul Brandes 🌟 Manager

I would agree with a soluble mineral such as chalcanthite. Plus, it's known to come from Bad Ems.

Just a thought...

21st Mar 2018 04:21 UTCDouglas Merson 🌟 Expert

I had considered chalcanthite but was unsure as it looked different than what I have from the US southwest. I found another piece that was not as good and put in water and it dissolved rather quickly so I will go with the chalcanthite ID. Thanks folks.

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