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Tobi
Site Admin
Joined: 07 Apr 2009
Posts: 4235
Location: Germany
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 Posted: Jan 16, 2014 09:09 Post subject: A mineralogical trip through Germany / Thueringen - Thuringia |
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The land in the middle of Germany mainly consists of mountain and hill ranges and thus is a mineral-rich region, though it does not have that many classics for collectors. The most important localities are in the north where Thuringia borders the Harz Mountains.
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Fluorite
Caaschwitz, Gera, Thuringia, Germany
4,5 x 2,5 cm
Collection & Photo: Tobias Martin |
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43325 Time(s) |
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Ed Huskinson
Joined: 15 Apr 2009
Posts: 318
Location: Kingman, Arizona
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| Posted: Jan 16, 2014 15:53 Post subject: Re: A mineralogical trip through Germany / Thueringen - Thuringia |
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Gee whiz, this looks so much like the fluorites from the Blanchard Mine, Bingham, New Mexico.
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Must be a similar geologic setting. Quite remarkable!
Keep posting!
_________________
La respuesta está en las rocas!! Estudiadlas!!
Ed |
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Andreas Gerstenberg
Joined: 04 Mar 2010
Posts: 336
Location: Chemnitz
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| Posted: Jan 17, 2014 06:32 Post subject: Re: A mineralogical trip through Germany / Thueringen - Thuringia |
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A range of Thuringian specimens from my collection:
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Malachite
Arme Hilfe mine, Ullersreuth, Vogtland, Thuringia, Germany
9 x 6 cm |
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43224 Time(s) |
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Azurite, malachite
Kronprinz mine, Kamsdorf, Thuringia, Germany
6 x 4 cm |
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43262 Time(s) |
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Pyrolusite
Luthersteufe mine, Öhrenstock, Thuringia, Germany
14,5 x 11 cm |
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43113 Time(s) |
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Mellite
Auguste coal mine, Artern, Thuringia, Germany
1,5 x 1 cm
Type locality. |
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43175 Time(s) |
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Fluorite, hematite, quartz
Seebachfelsen, Friedrichroda, Thuringia, Germany
5 x 4 cm |
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43122 Time(s) |
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Tobi
Site Admin
Joined: 07 Apr 2009
Posts: 4235
Location: Germany
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| Posted: Mar 30, 2014 09:55 Post subject: Re: A mineralogical trip through Germany / Thueringen - Thuringia |
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| Ed Huskinson wrote: | | Gee whiz, this [fluorite from Caaschwitz, Thuringia] looks so much like the fluorites from the Blanchard Mine, Bingham, New Mexico. Must be a similar geologic setting. Quite remarkable! Keep posting! |
Hi Ed, I somehow forgot your post until I browsed this thread again today.
They actually are different from the Blanchard specimens: The Caaschwitz fluorites are rather purple and never sky-blue. And they are all quite small while the Blanchard Mine produced larger cubes. However, I can fulfill your wish of more postings with a close-up of the Caaschwitz fluorite specimen :-)
Cheers!
Tobi
| Description: |
Fluorite
Caaschwitz, Gera, Thuringia, Germany
FOV 2 cm |
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42932 Time(s) |
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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| Posted: Mar 30, 2014 16:29 Post subject: Re: A mineralogical trip through Germany / Thueringen - Thuringia |
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| Is the color stable in sunlight? Blanchard fluorite will fade from blue to clear, and remain that way.
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Tobi
Site Admin
Joined: 07 Apr 2009
Posts: 4235
Location: Germany
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| Posted: Mar 31, 2014 01:03 Post subject: Re: A mineralogical trip through Germany / Thueringen - Thuringia |
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| GneissWare wrote: | | Is the color stable in sunlight? Blanchard fluorite will fade from blue to clear, and remain that way. |
Good question, I don't know. I have the Caaschwitz specimen for one and a half years now, and it has not changed. But I also have a blue Blanchard Mine specimen for the same time and it has not changed, either ... maybe such fading processes take quite long (I hope so) ...?
Tobi
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Andreas Gerstenberg
Joined: 04 Mar 2010
Posts: 336
Location: Chemnitz
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| Posted: Mar 31, 2014 04:46 Post subject: Re: A mineralogical trip through Germany / Thueringen - Thuringia |
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Hi,
The Caaschwitz fluorites are rather stable in their colour (however, you shouldn´t put them in direct sunlight...), not as, for example, the blue crystals from Halsbrücke/Saxony.
Cheers
Andreas
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Jordi Fabre
Overall coordinator of the Forum
Joined: 07 Aug 2006
Posts: 5020
Location: Barcelona
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| Posted: Apr 04, 2014 15:02 Post subject: A mineralogical trip through Germany / Thueringen - Thuringia / Hydroboracite |
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A "modern classic"
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Hydroboracite
Kohnstein Quarry, Niedersachswerfen, Nordhausen, Harz, Thuringia, Germany
Main crystal size: 3 × 0.7 cm
Photo: Reference Specimens |
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42591 Time(s) |
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Andreas Gerstenberg
Joined: 04 Mar 2010
Posts: 336
Location: Chemnitz
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| Posted: Aug 19, 2014 08:41 Post subject: Re: A mineralogical trip through Germany / Thueringen - Thuringia |
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The Ronneburg uranium mining district is known for excellent mineral specimens such as variscite, wavellite, whewellite, gypsum and varíous systematic rarities. Here´s an old variscite/wavellite combo found in 1970:
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Variscite, wavellite
Lichtenberg open cast, Ronneburg, Thuringia, Germany
7,5 x 5 cm |
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41603 Time(s) |
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Tobi
Site Admin
Joined: 07 Apr 2009
Posts: 4235
Location: Germany
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| Posted: Feb 16, 2015 13:11 Post subject: Re: A mineralogical trip through Germany / Thueringen - Thuringia |
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Not my taste, but I know many collectors consider this a holy grail of German minerals:
| Mineral: | Manganite |
| Locality: | | Ilfeld, Nordhausen, Nordhausen District, Thuringia/Thüringen, Germany |  |
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| Dimensions: | Specimen size 18 cm |
| Description: |
| Collection: GeoMuseum TU Clausthal (my photo) |
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40911 Time(s) |
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Andreas Gerstenberg
Joined: 04 Mar 2010
Posts: 336
Location: Chemnitz
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| Posted: Feb 17, 2015 08:59 Post subject: Re: A mineralogical trip through Germany / Thueringen - Thuringia |
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Like the Pöhla barytes. Nice pieces but fairly overrated.
| Mineral: | Manganite |
| Locality: | | Ilfeld, Nordhausen, Nordhausen District, Thuringia/Thüringen, Germany | |
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| Dimensions: | Specimen size 7,5 cm |
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40860 Time(s) |
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Andreas Gerstenberg
Joined: 04 Mar 2010
Posts: 336
Location: Chemnitz
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| Posted: Jul 17, 2015 13:16 Post subject: Re: A mineralogical trip through Germany / Thueringen - Thuringia |
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Another Thuringian Fluorite:
| Mineral: | Fluorite, baryte |
| Locality: | | Stahlberg Mine, Trusetal, Floh-Seligenthal, Schmalkalden-Meiningen District, Thuringia/Thüringen, Germany | |
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| Dimensions: | 5 x 4 cm |
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39881 Time(s) |
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Andreas Gerstenberg
Joined: 04 Mar 2010
Posts: 336
Location: Chemnitz
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| Posted: Dec 08, 2015 09:38 Post subject: Re: A mineralogical trip through Germany / Thueringen - Thuringia |
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Since Jordi picked up all that stuff it´s so hard to get a more or less satisfying strontioginorite specimen here in Germany...
| Mineral: | Strontioginorite |
| Locality: | | Kohnstein Quarry, Niedersachswerfen, Nordhausen District, Thuringia/Thüringen, Germany | |
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| Dimensions: | Picture width: 10 cm, crystals up to 3 cm, total specimen 16 x 13 cm |
| Description: |
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39092 Time(s) |
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Tobi
Site Admin
Joined: 07 Apr 2009
Posts: 4235
Location: Germany
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| Posted: Jan 11, 2016 14:27 Post subject: Re: A mineralogical trip through Germany / Thueringen - Thuringia |
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Cute tiny plate of wavellite:
| Mineral: | Wavellite |
| Locality: | | Lichtenberg open cast, Ronneburg U deposit, Gera, Greiz District, Thuringia/Thüringen, Germany | |
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| Dimensions: | Specimen size ~ 50-60 cm |
| Description: |
| Collection Terra Mineralia, Freiberg (my photo) |
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38530 Time(s) |
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Tobi
Site Admin
Joined: 07 Apr 2009
Posts: 4235
Location: Germany
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| Posted: Apr 13, 2016 11:44 Post subject: Re: A mineralogical trip through Germany / Thueringen - Thuringia |
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Another tiny specimen from Thuringia ;-)
| Mineral: | Gypsum on Halite |
| Locality: | | Bleicherode, Nordhausen District, Thuringia/Thüringen, Germany | |
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| Dimensions: | Specimen size 45 cm |
| Description: |
| Collection Terra Mineralia, Freiberg (my photo) |
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37678 Time(s) |
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