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Identity HelpLocation help: Johan Friedrich Gr., Koen, Baden-Wurttemberg

7th May 2012 18:47 UTCVik Vanrusselt Expert

Hello all,

I bought a specimen of Beyerite at the Minerant mineral fair in Antwerp yesterday.

The location on the label is: Johan Friedrich Gr. Koen, Black Forest, Baden-Württemberg, Germany.

I can't find this locality on Mindat, any ideas?

Thanks,

Vik

8th May 2012 19:01 UTCUwe Kolitsch Manager

Sounds like a misprinted locality. Do you have a scan of the label? (Or is it printed or well-written anyway?)

8th May 2012 21:58 UTCVik Vanrusselt Expert

I found out that underneath the visible label was another one.

the original label reads (translated into English):

Beyerite

(Cu,Pb)(BiO)₂(CO₃)₂ --→ What mineral is this?

brown-yellow aggr.

crusts on Calcite and Malachite

Joh. Friedrich Mine

Black Forest

B.R.D.

the 'new' label reads (translated into English):

Beyerite

Johan Friedrich Gr. Koen

Black Forest

Bad. Wurt.,

B.R.D.

Vik

EDIT: FORMULA DOES NOT CORRESPOND TO BEYERITE

9th May 2012 00:10 UTCEmil Box

Hi Vik,

Schönegrund

is "Grube Johann-Friedrich" see "Mineralfundstellen Baden-Württemberg" M. Glas/H.Schmeltzer 1977:

"Königswart" at last was named "Johan-Friedrich" from 1823-1825.

Groeten

Milo

10th May 2012 19:14 UTCUwe Kolitsch Manager

Thanks, Emil. That makes sense - bismutite and beyerite are well-known from this mine.

Will add the alternate name to the locality.

10th May 2012 21:52 UTCVik Vanrusselt Expert

Thank you Emil!

I found a reference to the mine in "Beyträge zur Geschichte des teutschen Bergbaues" (1783) by Johann Friedrich Gmelin:

http://books.google.be/books?id=9yQ7AAAAcAAJ&pg=PA428&lpg=PA428&dq=%22k%C3%B6nigswart%22+%22grube+johann-friedrich%22&source=bl&ots=muafOhPGZf&sig=I75j0I00y7vjdWZ0nAvBsGqr3tE&hl=nl&sa=X&ei=MdSqT8CZE4SZ-wbvj4mdCg&sqi=2&ved=0CDIQ6AEwAg#v=onepage&q=%22k%C3%B6nigswart%22%20%22grube%20johann-friedrich%22&f=false

Translation:

The Johann Friedrich Quarry or the old Königswart in the Murg Valley, not far from the village of Roth in the "Klosteramt" (i.e. an administrative division centering on the estates of a dissolved monastery) of Reichenbach, was, already under Duke Friedrich, known for it's beautiful copper and rich silver ores.

In 1739, from this mine and the mines S(aint) Peter and S(aint) George, 57 Zentner (1 Zentner is 50 kilograms) and 55 pounds were molten. Per Zentner, these ores from the last mine contained 1 loth (approximately 16 grams) of silver and 4 pounds of copper.

And from 17 1/2 Zentner gathered together from all of these mines came 150 pounds of rock and 59 pounds of iron-bearing chalk.

Vik

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