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Improving Mindat.orgBismuth

9th Jul 2017 07:35 UTCChristian Auer 🌟 Expert

https://www.mindat.org/photo-830826.html

It seems to be bismuth and it seems to be from Hüttenberg. I know many specimen from there; we have one with about 7kg almost pure bismuth in siderite. I just wondered what happened to this one and think it was treated in two ways which should be mentioned in the description.

It was cut and it was heavy etched. Etching siderite you need at least HCl (strong or warm). I wouldn`t have done it but ok tastes are different.

But it should be mentioned somewhere!

9th Jul 2017 16:47 UTCChristian Auer 🌟 Expert

-- moved topic --

10th Jul 2017 01:28 UTCReiner Mielke Expert

I agree with Christian.

10th Jul 2017 23:38 UTCMartin Rich Expert

Yes Christian, it looks to me also as etched out from siderite.

12th Jul 2017 07:33 UTCRob Woodside 🌟 Manager

ditto

12th Jul 2017 08:57 UTCMartyn Coles Expert

Thanks for the info. It was purchased and no mention of any treatment was provided. I will update the description.

To be honest I'd rather have a non-treated sample...

12th Jul 2017 09:02 UTCMartyn Coles Expert

Done!

12th Jul 2017 09:05 UTCMartyn Coles Expert

I assume the non-treated samples look more like:

Photo ID: 147765, 542947, 736915 ??

12th Jul 2017 10:21 UTCChristian Auer 🌟 Expert

Yes these are untreated bismuth specimen.

It was very common stuff around 1985, my guess would be several hundred kg were found in that time.

12th Jul 2017 22:53 UTCMartin Rich Expert

Howerver, an interessting specimen. The three-dimensional assignment of bismuth is better visible.