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Tobi
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Joined: 07 Apr 2009
Posts: 4112
Location: Germany
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Posted: Jun 07, 2010 07:32 Post subject: Re: Collection of Tobias Martin |
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Finally some pictures of the odd twinned calcite (size 25 mm) inside the vug.
(See previous page of this thread for overall pictures and general information about this specimen).
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Andreas Gerstenberg
Joined: 04 Mar 2010
Posts: 336
Location: Chemnitz
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Posted: Jun 09, 2010 07:35 Post subject: Re: Collection of Tobias Martin |
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Cool Holzen calcite!
@Pete: matches quite well.
Cheers
Andreas
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Tobi
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Location: Germany
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Posted: Jun 09, 2010 09:59 Post subject: Re: Collection of Tobias Martin |
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Thank you, Andreas!
This time i want to add a picture of the specimen label. It was made by the previous owner (and miner) of the specimen, Ingo Löffler. The label looks old at first sight, but is computer-made. Nevertheless i think it is a good example for a label which looks nostalgic and reminiscent of the beautiful old labels that mineral collectors used to write in the past.
The label says: Calcit, Stbr. (Steinbruch) "Calcit" Holzen, Sauerland, NRW, Deutschland.
(Calcite, "Calcite quarry" Holzen, Sauerland, North Rhine-Westphalia, Germany.)
Measures 65 x 55 mm.
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Tobi
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Joined: 07 Apr 2009
Posts: 4112
Location: Germany
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Posted: Jul 29, 2010 02:54 Post subject: Re: Collection of Tobias Martin |
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A better picture of a specimen that i posted before: Conichalcite from Gold Hill, Tooele County, Utah, USA. Size of the specimen is 120 x 90 x 80 mm. The detailed picture of the bright green conichalcite has a 30 mm field of view.
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Tobi
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Joined: 07 Apr 2009
Posts: 4112
Location: Germany
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Posted: Jul 29, 2010 02:57 Post subject: Re: Collection of Tobias Martin |
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Another clear quartz specimen, this time not from China but from Minas Gerais, Brazil. Height of the crystal cluster 140 mm.
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Tobi
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Joined: 07 Apr 2009
Posts: 4112
Location: Germany
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Posted: Jul 29, 2010 08:53 Post subject: Re: Collection of Tobias Martin |
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I will continue the mission "better pictures of already posted specimens" with that combination of a gemmy 25 mm aquamarine crystal grown on a 20 mm smoky quartz. From Erongo Mountains, Namibia. Overall size 40 x 25 x 20 mm.
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Carles Millan
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Joined: 05 May 2007
Posts: 1474
Location: Catalonia
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Posted: Jul 29, 2010 09:59 Post subject: Re: Collection of Tobias Martin |
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A quartz specimen with a great transparency... And I guess the Erongo aquamarine must be better in person. Could you try with another light source and a different background?
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Tobi
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Joined: 07 Apr 2009
Posts: 4112
Location: Germany
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Posted: Aug 01, 2010 09:42 Post subject: Re: Collection of Tobias Martin |
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Maybe i'll try later, but at the moment the aqua doesn't like me and the DigiCam ;-) So first some other specimens. This is a light green apophyllite from Pune, Maharashtra, India. Longest crystal 35 mm, overall size 60 x 55 x 40 mm.
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Tobi
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Joined: 07 Apr 2009
Posts: 4112
Location: Germany
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Posted: Aug 01, 2010 09:56 Post subject: Re: Collection of Tobias Martin |
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A large specimen of halite from a locality in eastern Hesse, not far away from my hometown Marburg: Neuhof-Ellers Potash Works near Fulda, exactly in the geographical center of Germany ( www.mindat.org/loc-36277.html ).
The specimen has a size of 200 x 80 x 60 mm, the longest halite cubes measure 12 mm.
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Tobi
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Joined: 07 Apr 2009
Posts: 4112
Location: Germany
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Posted: Aug 02, 2010 07:42 Post subject: Re: Collection of Tobias Martin |
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Microline var. amazonite, from Pikes Peak, Colorado, USA. Largest crystal 30 x 30 x 20mm, overall size 90 x 60 x 50 mm.
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Tobi
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Location: Germany
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Posted: Aug 18, 2010 08:20 Post subject: Re: Collection of Tobias Martin |
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Yellow baryte from Châtel-Guyon, Auvergne, France. 80 x 40 x 30 mm.
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Detail photo of the crystals (each one ~ 12-15 mm.) |
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Tobi
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Joined: 07 Apr 2009
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Location: Germany
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Posted: Aug 19, 2010 10:14 Post subject: Re: Collection of Tobias Martin |
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Topaz from the most famous European topaz locality, the Schneckenstein cliff near Klingenthal, Saxony, Germany. Specimen size 85 x 70 x 50 mm, longest crystal 25 mm.
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The longest topaz crystal (~ 25 mm) on this specimen. |
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A tiny group of quartz crystals (largest 5 mm) that are often a nice feature of Schneckenstein topazes. |
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Tobi
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Joined: 07 Apr 2009
Posts: 4112
Location: Germany
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Posted: Oct 30, 2010 08:25 Post subject: Re: Collection of Tobias Martin |
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A large fluorite specimen from Shangbao pyrite mine, Hunan Province, China. Overall size 125 x 115 x 80 mm, largest crystals 30-35 mm.
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Overall picture of the specimen. The fluorite crystals are sitting on a matrix that consists a lot of pyrite crystals. |
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Pictures of the specimen standing upright. |
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A closer shot of the pyrite-rich matrix. |
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A picture that shows the structure of the pale green and very clear fluorite. |
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Tobi
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Location: Germany
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Posted: Oct 30, 2010 08:36 Post subject: Re: Collection of Tobias Martin |
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Two other fluorite specimens:
The first one comes from Berbes, Asturias, Spain. Overall size 105 x 70 x 75 mm, largest crystal 15 mm.
The second one is from Elmwood Mine, Tennessee/USA and features two large and many very small of the typical fluorites for that locality, grown on the characteristic matrix of crystallized sphalerite. Overall size 100 x 65 x 55 mm, largest crystal nearly 20 mm.
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Tobi
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Location: Germany
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Posted: Oct 30, 2010 10:04 Post subject: Re: Collection of Tobias Martin |
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A specimen from Erongo Mountains, Namibia: Schorl crystals grown on orthoclase. Overall size 120 x 100 x 90 mm, largest schorl crystal 20 mm, largest orthoclase crystal 35 mm.
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Tobi
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Location: Germany
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Posted: Oct 30, 2010 13:56 Post subject: Re: Collection of Tobias Martin |
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Inspired by many beautiful mineral labels i've seen, i decided to make my own "classic" labels for the display collection. The recent acquisitions, e.g. the Namibian specimen above, are the first to get one of the new "old" labels. I attached it as a sample, (it says: Mineral Collection of Tobias Martin. Tourmaline (Schorl) on Feldspar. Erongo Mountains, Erongo, Namibia). I printed those labels on marbled paper, the size of each one is 50 x 25 mm. What do you think - is it a good look for such a nostalgic mineral label?
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Tobi
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Joined: 07 Apr 2009
Posts: 4112
Location: Germany
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Posted: Oct 31, 2010 04:19 Post subject: Re: Collection of Tobias Martin |
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Galena associated with quartz and some chalcopyrite. From Madan ore field, Rhodope Mountains, Bulgaria. Overall size 120 x 85 x 85 mm, largest galena cube 11 mm, largest quartz crystal 14 mm.
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Overall picture of the specimen. |
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Closer picture of some of the galena crystals, each one ~ 1 cm. |
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Tobi
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Location: Germany
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Posted: Oct 31, 2010 05:01 Post subject: Re: Collection of Tobias Martin |
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Calcite from Irai, Rio Grande do Sul, Brazil. Overall size 140 x 125 x 60 mm, longest crystal 60 mm.
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Some crystals (20, 25 & 45 mm). |
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Tobi
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Location: Germany
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Posted: Nov 18, 2010 12:09 Post subject: Re: Collection of Tobias Martin |
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Tourmaline (elbaite var. indicolite) on quartz.
From the so-called "Pieters Mine", a small mine in a pegmatite field near Usakos, Erongo region, Namibia.
The specimen measures 140 x 90 x 40 mm and features a large, terminated tourmaline crystal with a size of 90 x 17 mm + some smaller crystals.
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Different angles + a picture of the specimen on display |
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Carles Millan
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Location: Catalonia
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Posted: Nov 21, 2010 06:04 Post subject: Re: Collection of Tobias Martin |
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This is a remarkable specimen from Erongo. We are used to see splendid schorls from there but not well shaped colored elbaites. This one shows well defined edges, and is on matrix, which is rather rare in that locality. Just search Mindat database for 'elbaite' and 'Usakos' to see.
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_________________ Al carrer Duran i Bas, si no hi vas no t'hi duran |
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