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Identity HelpMystery silver mineral
23rd Aug 2019 03:51 UTCKyle Beucke
23rd Aug 2019 03:53 UTCKyle Beucke
23rd Aug 2019 03:59 UTCKyle Beucke
29th Aug 2019 16:17 UTCUwe Kolitsch Manager
31st Aug 2019 02:42 UTCKyle Beucke
31st Aug 2019 17:31 UTCFrank Keutsch Expert
2nd Sep 2019 16:29 UTCKyle Beucke
26th Sep 2019 20:49 UTCKyle Beucke
Here is another EDS analysis of a fragment of this crystal, focusing on a fresh fracture surface. No copper and possibly no antimony either. I am thinking some kind of weird intergrowth, possibly a replacement of an earlier sulfosalt by acanthite. The material is brittle and certainly does not behave like pure acanthite (I have flattened many a grain of acanthite under the scope). Strange! Soon I hope to have some backscatter images from this same rock with lots of the brittle black mystery mineral and might be able to figure this out.
12th Oct 2019 19:19 UTCKyle Beucke
12th Oct 2019 19:52 UTCUwe Kolitsch Manager
12th Oct 2019 19:53 UTCKevin Conroy Expert
12th Oct 2019 20:14 UTCKyle Beucke
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