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Tobi
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Joined: 07 Apr 2009
Posts: 4112
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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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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Azurite, malachite Kronprinz mine, Kamsdorf, Thuringia, Germany 6 x 4 cm |
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Pyrolusite Luthersteufe mine, Öhrenstock, Thuringia, Germany 14,5 x 11 cm |
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Mellite Auguste coal mine, Artern, Thuringia, Germany 1,5 x 1 cm Type locality. |
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Fluorite, hematite, quartz Seebachfelsen, Friedrichroda, Thuringia, Germany 5 x 4 cm |
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38245 Time(s) |
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Tobi
Site Admin
Joined: 07 Apr 2009
Posts: 4112
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
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Fluorite Caaschwitz, Gera, Thuringia, Germany FOV 2 cm |
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38060 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: 4112
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
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Joined: 07 Aug 2006
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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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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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Tobi
Site Admin
Joined: 07 Apr 2009
Posts: 4112
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 |
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Collection: GeoMuseum TU Clausthal (my photo) |
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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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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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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 |
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Tobi
Site Admin
Joined: 07 Apr 2009
Posts: 4112
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 |
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Collection Terra Mineralia, Freiberg (my photo) |
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33652 Time(s) |
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Tobi
Site Admin
Joined: 07 Apr 2009
Posts: 4112
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 |
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Collection Terra Mineralia, Freiberg (my photo) |
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Andreas Gerstenberg
Joined: 04 Mar 2010
Posts: 336
Location: Chemnitz
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Posted: Apr 25, 2016 09:32 Post subject: Re: A mineralogical trip through Germany / Thueringen - Thuringia |
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Gold from Thuringia:
Mineral: | Gold, Pyrite, Arsenopyrite, Chamosite |
Locality: | Schmiedefeld, Saalfeld, Saalfeld-Rudolstadt District, Thuringia/Thüringen, Germany | |
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Dimensions: | 5 x 3,5 cm |
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Andreas Gerstenberg
Joined: 04 Mar 2010
Posts: 336
Location: Chemnitz
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Posted: May 06, 2016 04:06 Post subject: Re: A mineralogical trip through Germany / Thueringen - Thuringia |
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In the late 1960s and 1970s the Henneberg quarry near Weitisberga was a famous locality for beryl aggregates in granite. The radial crystals reached 10 cm and more.
Mineral: | Beryl |
Locality: | Henneberg Quarry, Weitisberga, Wurzbach, Saale-Orla-Kreis, Thuringia/Thüringen, Germany | |
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Dimensions: | Picture width 19 cm |
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Andreas Gerstenberg
Joined: 04 Mar 2010
Posts: 336
Location: Chemnitz
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Posted: Jan 18, 2017 12:54 Post subject: Re: A mineralogical trip through Germany / Thueringen - Thuringia |
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A calcite find from the early 1980s:
Mineral: | Calcite |
Locality: | Zechengrund, Beulwitz, Saalfeld, Saalfeld-Rudolstadt District, Thuringia/Thüringen, Germany | |
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Dimensions: | 9 x 7 cm |
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Very similar to the popular calcites from Kamsdorf, which is also in the Saalfeld mining district. |
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Jordi Fabre
Overall coordinator of the Forum
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Location: Barcelona
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Posted: May 10, 2017 02:55 Post subject: Re: A mineralogical trip through Germany / Thueringen - Thuringia |
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What can we expect to find in Thuringia? : Manganite from Ilfeld. But also marvelous rarities from Köhnstein Quarry!
Mineral: | Manganite (after Pyrolusite) |
Locality: | Ilfeld, Nordhausen, Nordhausen District, Thuringia/Thüringen, Germany | |
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Dimensions: | Specimen size: 3.6 × 1.8 × 1.8 cm |
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Mineral: | Hydroboracite |
Locality: | Kohnstein Quarry, Niedersachswerfen, Nordhausen District, Thuringia/Thüringen, Germany | |
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Specimen size: 3.2 × 1.4 × 0.5 cm |
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Mineral: | Hydroboracite |
Locality: | Kohnstein Quarry, Niedersachswerfen, Nordhausen District, Thuringia/Thüringen, Germany | |
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Dimensions: | Main crystal size: 3 × 0.7 cm |
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Mineral: | Strontioginorite |
Locality: | Kohnstein Quarry, Niedersachswerfen, Nordhausen District, Thuringia/Thüringen, Germany | |
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Main crystal size: 1.5 × 0.2 cm |
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Andreas Gerstenberg
Joined: 04 Mar 2010
Posts: 336
Location: Chemnitz
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Posted: Jan 27, 2018 13:39 Post subject: Re: A mineralogical trip through Germany / Thueringen - Thuringia |
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Classic malachite from Thuringia, ex Heinrich von Struve collection.
Mineral: | Malachite |
Locality: | Arme Hilfe Mine, Ullersreuth, Hirschberg (Saale), Saale-Orla-Kreis, Thuringia/Thüringen, Germany | |
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Dimensions: | 6,5 x 5,5 cm |
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