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Carles Millan
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Joined: 05 May 2007
Posts: 1471
Location: Catalonia
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Posted: Mar 27, 2012 15:10 Post subject: Re: Collection of Tobias Martin |
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Tobias Martin wrote: | I'm glad not to be only one with this problem - but i knew before that i am not ;-) I remember Carles often telling me that he has really long sessions until he gets some of his specimens captured. Really comforting that you also know this problem ;-) |
Tobias,
The explanation is quite simple. The procedure used by a camera to capture an image is radically different from the one used by our eyes. So nobody should expect to get a photo that is exactly equal to the image seen by him/her. I've even recently heard that the great Jeff Scovil declines to shot some specimens, especially those that are absolutely transparent.
Nature took about one thousand million years to develop the astonishing eye-retina-brain system through a slow evolution. How long ago was the photographic camera invented?
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Louis Friend
Joined: 26 Jan 2012
Posts: 89
Location: Adelaide
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Posted: Mar 27, 2012 18:39 Post subject: Re: Collection of Tobias Martin |
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Carles Millan wrote: | Tobias Martin wrote: | I'm glad not to be only one with this problem - but i knew before that i am not ;-) I remember Carles often telling me that he has really long sessions until he gets some of his specimens captured. Really comforting that you also know this problem ;-) |
Tobias,
The explanation is quite simple. The procedure used by a camera to capture an image is radically different from the one used by our eyes. So nobody should expect to get a photo that is exactly equal to the image seen by him/her. I've even recently heard that the great Jeff Scovil declines to shot some specimens, especially those that are absolutely transparent.
Nature took about one thousand million years to create the astonishing eye-retina-brain system through a slow evolution. How long ago was the photographic camera invented? |
Hi Carles and Tobias:
Just thought I would let you know about resolution, but I will keep the physics to a minimum. The old style cameras that took the photos that had to be developed by chemical methods produced images with a resolution of about 35 Megapixels. The human eye depending on the age and state of health of its owner can “produce” images at about 130 Megapixel resolution. My camera produces at best 11 Megapixel resolution. The human eye absolutely “kills” the opposition!
My children are doing photography at school as one of their electives and they were allowed to borrow a digital camera for the weekend. The camera they used was 20 Megapixel I think but it could take images in “RAW” format. This format produces astonishing pictures in my opinion, but it comes at a cost – a minimum of about $1200AUD per basic camera.
I am working on a DIY that should enable anyone to take good photos of their pieces. When complete I will post the results.
Regards
Louis
PS:
Just a bit of mineralogical trivia. Before Jeff Scovil got into mineral photography he used to sell Persian carpets and rugs - neat.
_________________ "The aim of science is to make difficult things understandable in a simpler way; the aim of poetry is to state simple things in an incomprehensible way. The two are incompatible." Dirac |
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Tobi
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Joined: 07 Apr 2009
Posts: 4108
Location: Germany
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Posted: Mar 28, 2012 01:54 Post subject: Re: Collection of Tobias Martin |
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Carles Millan wrote: | Nature took about one thousand million years to create the astonishing eye-retina-brain system through a slow evolution. How long ago was the photographic camera invented? |
Around the middle of the 19th century ;-) But i rather consider your question rhetorical, and thus i can only thank you for your nearly philosophic comment! Sometimes i should consider this and be a little more patient ...
Louis Friend wrote: | The human eye absolutely “kills” the opposition! |
You're right, no odinary camera can mess with our eyes. Nevertheless every collector wants to make the best possible pictures of his specimens, and it can be frustrating if some "refuse" to get photographed. And when i sometimes see the spectacular photos made by Scovil or Rewitzer (or even "amateur" photographers like Carles here in our forum) i see that there's a big difference between their pictures and the sometimes really bad ones i produce. But sometimes there are some highlights like my Siegerland galena from the page before that comfort me ;-)
I'm excited to see your results, thanks in advance for your effort!
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Tobi
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Joined: 07 Apr 2009
Posts: 4108
Location: Germany
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Posted: Mar 28, 2012 02:23 Post subject: Re: Collection of Tobias Martin |
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Here's another specimen that taxed my patience while i tried to make some pictures:
Trying to compete with our museum ( https://www.mineral-forum.com/message-board/files/rauchq_184.jpg ), but i think my specimen misses a little bit of size and colour to mess with the other one ;-)
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Smoky quartz Göscheneralp, Uri, Switzerland 130 x 80 x 75 mm, longest crystal 60 mm |
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Smoky quartz Göscheneralp, Uri, Switzerland Main crystal group, 60 x 40 x 40 mm |
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Smoky quartz Göscheneralp, Uri, Switzerland Small clear crystal at the backside, 14 mm |
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33738 Time(s) |
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Tobi
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Joined: 07 Apr 2009
Posts: 4108
Location: Germany
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Posted: Mar 30, 2012 06:45 Post subject: Re: Collection of Tobias Martin |
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Copper from the U.S.:
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Copper Michigan, USA (no more detailed information, sorry) Height 60 mm |
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33635 Time(s) |
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Tobi
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Joined: 07 Apr 2009
Posts: 4108
Location: Germany
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Posted: Mar 30, 2012 06:49 Post subject: Re: Collection of Tobias Martin |
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Smithsonite from Namibia:
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Smithsonite Skorpion Mine, Karas Region, Namibia Width 65 mm |
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33658 Time(s) |
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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Posted: Mar 30, 2012 08:09 Post subject: Re: Collection of Tobias Martin |
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Tobias Martin wrote: | Copper from the U.S.: |
This looks like the copper specimens that Richard at Red Metal Mining was producing in the 1980s and 1990s from the Adventure Mine, Greenland, Ontonagan County, Michigan, USA. During this same time frame, he was producing from the Osceola and Caledonia mines, but those specimens had Calcite or Prehnite as associations.
At the very least, you can label it as Upper Peninsula, Michigan, USA.
Perhaps George or Susan could confirm for you by PM as well.
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Tobi
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Joined: 07 Apr 2009
Posts: 4108
Location: Germany
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Posted: Mar 31, 2012 09:34 Post subject: Re: Collection of Tobias Martin |
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Thank you, i will take a note of this.
Here's another specimen with a very vague locality information ("Former Soviet Union"). I've shown this specimen before in a thread were i asked if somebody knows the exact provenience: https://www.mineral-forum.com/message-board/viewtopic.php?t=2139
Here's the specimen again with a good picture. Again, i would be very happy to get some clues where my grey scalenohedral "communist calcite" could be from ;-)
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Calcite ? ("Former Soviet Union") Height 70 mm |
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33583 Time(s) |
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Jordi Fabre
Overall coordinator of the Forum
Joined: 07 Aug 2006
Posts: 4897
Location: Barcelona
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Posted: Apr 01, 2012 14:21 Post subject: Re: Collection of Tobias Martin |
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Tobias Martin wrote: |
Here's the specimen again with a good picture. Again, i would be very happy to get some clues where my grey scalenohedral "communist calcite" could be from ;-)
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Although without sulfides it still looks to me as from Dzhezkazgan, Kazakhstan...
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Louis Friend
Joined: 26 Jan 2012
Posts: 89
Location: Adelaide
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Posted: Apr 01, 2012 23:38 Post subject: Re: Collection of Tobias Martin |
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Dear Tobias:
I would like to extend my appreciation for your posts. You have a wide selection of specimens and localities – all fine. Just a quick question – are you a teacher? Regarding localities have you ever thought about approaching the scientific staff of one of Germany’s many fine museums? I have had some success here in Australia by comparing unknowns with reference material some of our Museum’s store in their dusty basements. Most scientific staff are very happy about helping enthusiasts.
Kind regards
Louis
_________________ "The aim of science is to make difficult things understandable in a simpler way; the aim of poetry is to state simple things in an incomprehensible way. The two are incompatible." Dirac |
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Tobi
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Joined: 07 Apr 2009
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Location: Germany
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Posted: Apr 03, 2012 11:07 Post subject: Re: Collection of Tobias Martin |
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Louis Friend wrote: |
You have a wide selection of specimens and localities – all fine. Just a quick question – are you a teacher? Regarding localities have you ever thought about approaching the scientific staff of one of Germany’s many fine museums? I have had some success here in Australia by comparing unknowns with reference material some of our Museum’s store in their dusty basements. Most scientific staff are very happy about helping enthusiasts. |
Hi Louis! Yes, i am a teacher, but what has that to do with the locality problem? Thanks for your advice of consulting a museum. We have a really great museum here in Marburg and i know nearly all of its specimens, but none of the calcites looks like that. And i also know the museum staff, but i don't think that they can help because none of them is an expert for Russian minerals. I think asking this international community here makes more sense, nevertheless thank you for your advice and your kind words!
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Louis Friend
Joined: 26 Jan 2012
Posts: 89
Location: Adelaide
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Posted: Apr 03, 2012 20:20 Post subject: Re: Collection of Tobias Martin |
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Tobias Martin wrote: | Louis Friend wrote: |
You have a wide selection of specimens and localities – all fine. Just a quick question – are you a teacher? Regarding localities have you ever thought about approaching the scientific staff of one of Germany’s many fine museums? I have had some success here in Australia by comparing unknowns with reference material some of our Museum’s store in their dusty basements. Most scientific staff are very happy about helping enthusiasts. |
Hi Louis! Yes, i am a teacher, but what has that to do with the locality problem? Thanks for your advice of consulting a museum. We have a really great museum here in Marburg and i know nearly all of its specimens, but none of the calcites looks like that. And i also know the museum staff, but i don't think that they can help because none of them is an expert for Russian minerals. I think asking this international community here makes more sense, nevertheless thank you for your advice and your kind words! |
Dear Tobias:
Many thanks for setting me straight on the matter of locality. I hope I did not offend you with my question about you being a teacher, and if I did, I unreservedly apologize. I was just curious to see if other teachers, and in particular science teachers were represented on FMF.
Kind Regards
Louis
_________________ "The aim of science is to make difficult things understandable in a simpler way; the aim of poetry is to state simple things in an incomprehensible way. The two are incompatible." Dirac |
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Tobi
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Joined: 07 Apr 2009
Posts: 4108
Location: Germany
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Posted: Apr 04, 2012 01:08 Post subject: Re: Collection of Tobias Martin |
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Hi Louis,
no problem, i think we had a simple misunderstanding: You did not offend me! I just didn't see the question in context with the topic, so i was somehow confused. There's absolutely no problem in talking about this, sorry for the misunderstanding. I am a teacher, but not in sciences that have to do with minerals or geologly - my subjects are German and History.
Cheers!
Tobi
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Tobi
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Location: Germany
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Posted: Apr 05, 2012 07:06 Post subject: Re: Collection of Tobias Martin |
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Old specimen (a large 23 cm halite specimen from Hesse), detailed pictures:
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Halite Neuhof-Ellers Potash Works, Neuhof, Fulda, Hesse, Germany Largest crystals ~ 15 mm |
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33241 Time(s) |
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Halite Neuhof-Ellers Potash Works, Neuhof, Fulda, Hesse, Germany Largest crystals ~ 15 mm |
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33270 Time(s) |
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Halite Neuhof-Ellers Potash Works, Neuhof, Fulda, Hesse, Germany Largest crystals ~ 15 mm |
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33251 Time(s) |
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Halite Neuhof-Ellers Potash Works, Neuhof, Fulda, Hesse, Germany Largest crystals ~ 15 mm |
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Halite Neuhof-Ellers Potash Works, Neuhof, Fulda, Hesse, Germany Largest crystals ~ 15 mm |
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33231 Time(s) |
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Halite Neuhof-Ellers Potash Works, Neuhof, Fulda, Hesse, Germany Largest crystals ~ 15 mm |
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33238 Time(s) |
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Carles Millan
Site Admin
Joined: 05 May 2007
Posts: 1471
Location: Catalonia
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Posted: Apr 05, 2012 08:08 Post subject: Re: Collection of Tobias Martin |
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Tobias Martin wrote: | Old specimen (a large 23 cm halite specimen from Hesse), detailed pictures: |
Good photos, even more considering that they are from colorless and transparent crystals, the most difficult to photograph.
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Louis Friend
Joined: 26 Jan 2012
Posts: 89
Location: Adelaide
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Posted: Apr 05, 2012 18:44 Post subject: Re: Collection of Tobias Martin |
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Tobias Martin wrote: | Hi Louis,
no problem, i think we had a simple misunderstanding: You did not offend me! I just didn't see the question in context with the topic, so i was somehow confused. There's absolutely no problem in talking about this, sorry for the misunderstanding. I am a teacher, but not in sciences that have to do with minerals or geologly - my subjects are German and History.
Cheers!
Tobi |
Dear Tobias:
I am glad you understand. When I am not conducting my daily affairs as either a Physicist or Mathematician, I rarely obey the rules of context. My wife says I ask very embarrassing questions, but one only acquires knowledge by asking questions. When I see or hear something interesting, it arouses my interest and I must pursue it even if it has nothing to do with the subject under discussion.
I like your Halite specimen – very nice!
Kind regards
Louis
_________________ "The aim of science is to make difficult things understandable in a simpler way; the aim of poetry is to state simple things in an incomprehensible way. The two are incompatible." Dirac |
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Tobi
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Joined: 07 Apr 2009
Posts: 4108
Location: Germany
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Posted: Apr 06, 2012 02:56 Post subject: Re: Collection of Tobias Martin |
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Old specimen, more and better photos:
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Calcite Elmwood mine, Carthage, Smith Co., Tennessee, USA 100 x 90 x 50 mm, main crystal 50 mm |
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33049 Time(s) |
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Calcite Elmwood mine, Carthage, Smith Co., Tennessee, USA 100 x 90 x 50 mm, main crystal 50 mm |
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33028 Time(s) |
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Calcite Elmwood mine, Carthage, Smith Co., Tennessee, USA 100 x 90 x 50 mm, main crystal 50 mm |
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Calcite Elmwood mine, Carthage, Smith Co., Tennessee, USA Main crystal (50 mm) |
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33053 Time(s) |
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Tobi
Site Admin
Joined: 07 Apr 2009
Posts: 4108
Location: Germany
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Posted: Apr 06, 2012 06:04 Post subject: Re: Collection of Tobias Martin |
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I think my halite close-ups above were quite ok, so i tried some more detail pictures of some of my specimens. I want to start with an azurite specimen from Aouli, Morocco:
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Azurite with great blue colour Aouli, Khénifra Province, Meknès-Tafilalet Region, Morocco FOV 30 mm |
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33028 Time(s) |
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Azurite, malachite, fluorite, baryte Aouli, Khénifra Province, Meknès-Tafilalet Region, Morocco FOV 30 mm |
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32954 Time(s) |
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Azurite, malachite, fluorite, baryte Aouli, Khénifra Province, Meknès-Tafilalet Region, Morocco FOV 30 mm |
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33000 Time(s) |
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Azurite, malachite, fluorite, baryte Aouli, Khénifra Province, Meknès-Tafilalet Region, Morocco FOV 30 mm |
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Azurite, malachite, fluorite, baryte Aouli, Khénifra Province, Meknès-Tafilalet Region, Morocco FOV 30 mm |
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33007 Time(s) |
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Tobi
Site Admin
Joined: 07 Apr 2009
Posts: 4108
Location: Germany
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Posted: Apr 06, 2012 06:48 Post subject: Re: Collection of Tobias Martin |
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Again some close-ups, galena from Madan, Bulgaria:
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Galena, quartz Madan ore field, Rhodope Mts, Smolyan Oblast, Bulgaria Galena cubes ~ 1 cm |
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Galena, quartz Madan ore field, Rhodope Mts, Smolyan Oblast, Bulgaria Galena cubes ~ 1 cm |
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Galena, quartz Madan ore field, Rhodope Mts, Smolyan Oblast, Bulgaria Galena cubes ~ 1 cm |
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32920 Time(s) |
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Tobi
Site Admin
Joined: 07 Apr 2009
Posts: 4108
Location: Germany
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Posted: Apr 06, 2012 10:24 Post subject: Re: Collection of Tobias Martin |
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I trimmed this one from a large specimen of Indian Apophyllite. Rarely i was that satisfied with the result of my own specimen trimming: I got an elegant specimen with an outstanding main crystal while i removed nearly 75 % of the original specimen.
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Apophyllite Jalgaon District, Maharashtra, India Specimen height 100 mm, main crystal 50 mm |
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Apophyllite Jalgaon District, Maharashtra, India Specimen height 100 mm, main crystal 50 mm |
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Apophyllite Jalgaon District, Maharashtra, India Specimen height 100 mm, main crystal 50 mm |
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32892 Time(s) |
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