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30 Mar-00:04:40 Re: torbernite from musonoi dr congo? (Peter Lemkin)
29 Mar-20:01:46 Re: torbernite from musonoi dr congo? (Byron Anderson)
29 Mar-17:35:21 Re: collection of sante celiberti - a mineralogical trip through italy (Sante Celiberti)
29 Mar-16:26:49 Stay at home - coronavirus / covid-19 - nature (Jordi Fabre)
29 Mar-14:15:55 Re: torbernite from musonoi dr congo? (Peter Lemkin)
29 Mar-14:13:21 Re: dark line in brookite (Pete Richards)
29 Mar-12:50:09 Re: torbernite from musonoi dr congo? (Wendellwilson)
29 Mar-12:42:04 Re: collection of annemieke en rob schnerr (Rob Schnerr)
29 Mar-12:11:58 Re: dark line in brookite (Jordi Fabre)
29 Mar-09:23:40 Re: collection of michael shaw (Michael Shaw)
29 Mar-05:41:35 Re: collection of annemieke en rob schnerr (Tobi)
29 Mar-05:38:38 Re: torbernite from musonoi dr congo? (Tobi)
29 Mar-05:34:29 Re: collection of annemieke en rob schnerr (Rob Schnerr)
29 Mar-02:31:15 Re: collection of sante celiberti - a mineralogical trip through italy (Sante Celiberti)
28 Mar-23:48:48 The mizunaka collection - quartz (Am Mizunaka)
28 Mar-23:08:02 Re: stay at home - coronavirus / covid-19 (Don Lum)
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28 Mar-18:22:39 Stay at home - coronavirus / covid-19 - the work of others (Jordi Fabre)
28 Mar-18:12:45 Torbernite from musonoi dr congo? (Byron Anderson)
28 Mar-18:09:02 Dark line in brookite (Tgleckler)
28 Mar-17:19:46 Re: collection of sante celiberti - a mineralogical trip through italy (Sante Celiberti)
28 Mar-16:53:17 Re: don lum collection (Don Lum)
28 Mar-14:20:28 Re: stay at home - coronavirus / covid-19 (Don Lum)
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Collection of Tobi
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parfaitelumiere




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PostPosted: Dec 25, 2009 08:02    Post subject: Re: Collection of Tobias Martin  

Hi Tobias,

I have seen similar garnets as your big crystal,I don't remember wher it come from,but I will find and tell it in a couple of days.
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Tobi




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PostPosted: Dec 25, 2009 08:11    Post subject: Re: Collection of Tobias Martin  

Thank you very much, it would be great to have a reliable information about the locality.

The next photo is a better shot of a fluorite that i posted some time ago in much lower resolution. It comes from the Erongo Mountains, Namibia, crystal size 1 cm.



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Tobi




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PostPosted: Dec 26, 2009 09:50    Post subject: Re: Collection of Tobias Martin  

Another fluorite miniature from Namibia (Uis). Height of the octahedron 25 mm.


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Tobi




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PostPosted: Feb 07, 2010 09:51    Post subject: Re: Collection of Tobias Martin  

Another miniature from the Erongo Mountains: A cluster of two aquamarine crystals, the larger one has a width of 20 mm.


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Dawn MinetteCooper




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PostPosted: Feb 07, 2010 12:10    Post subject: Re: Collection of Tobias Martin  

A good material for showcase liners that I like to use is natural colored burlap. It has a matt shine and the tan color sets off most crystals very well. In yardage it is relatively inexpensive, but gives a good appearance in the show case.

Black Lyons velvet and off white velvet are also good, though the white tends to show stains from mineral crumbles.

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Dawn
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Tobi




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PostPosted: Feb 08, 2010 09:07    Post subject: Re: Collection of Tobias Martin  

Thank you for your advice, i'm anyway thinking about how i can find a liner that goes better together with the minerals than this bright wood ...

Next photo shows a pyrite cluster from the Huanzala Mine, height 55 mm.



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Tobi




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PostPosted: Mar 07, 2010 08:49    Post subject: Re: Collection of Tobias Martin  

Azurite from Aouli (near Midelt), Morocco. 100 x 95 x 40 mm. Common material, but a stunning blue colour in person, picture doesn't show it good enough. Associated with some malachite and even some tiny fluorite cubes on the backside.


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Tobi




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PostPosted: Mar 07, 2010 09:22    Post subject: Re: Collection of Tobias Martin  

Scalenohedral calcite from Allmendingen (near Ulm, Baden-Wuerttemberg, Germany). Height 90 mm.


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Tobi




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PostPosted: Mar 21, 2010 10:05    Post subject: Re: Collection of Tobias Martin  

40 mm schorl crystal on cleavelandite, from Shigar Valley, Pakistan. Overall size 60 x 40 x 30 mm.


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Tobi




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PostPosted: Mar 21, 2010 10:12    Post subject: Re: Collection of Tobias Martin  

Cluster of mostly transparent fluorite from Xianghuapu Mine (Hunan, China). The largest crystal edge measures 42 mm, overall size is 115 x 75 x 60 mm.


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Tobi




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PostPosted: Mar 21, 2010 10:59    Post subject: Re: Collection of Tobias Martin  

Another shot which focuses on the largest crystal. This cube measures 4 x 4 x 4 cm.


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PostPosted: Mar 22, 2010 05:04    Post subject: Re: Collection of Tobias Martin  

Sulphur on matrix from El Desierto Mine (Potosí, Bolivia). Actually i find the specimens from there rather boring (compared to the classics from Sicily which i really like), but this one features quite good terminated and transparent crystals (longest are about 1 cm in lenght) for that locality, instead of the crusty yellow masses which make the majority of El Desierto specimens. Overall size is 85 x 65 x 60 mm.


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Tobi




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PostPosted: Mar 23, 2010 07:32    Post subject: Re: Collection of Tobias Martin  

Two better shots of the schorl from Shigar Valley which show the upper termination.


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PostPosted: Mar 27, 2010 12:15    Post subject: Re: Collection of Tobias Martin  

Tarbuttite, Skorpion Mine, Karas Region, Namibia. 50 x 35 x 30 mm.


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Tobi




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PostPosted: Mar 27, 2010 12:36    Post subject: Re: Collection of Tobias Martin  

A calcite from a locality most of you will not know: Alme, near Brilon, Sauerland, North Rhine-Westphalia, Germany. This specimen is neither spectacular nor very aesthetic, but the crystal form is quite interesting. I've seen such a form never before on a calcite specimen, and it rather reminds me of some topaz crystals i've seen. Size 45 x 30 x 30 mm.


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Luiz Menezes




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PostPosted: Mar 28, 2010 10:14    Post subject: Re: Collection of Tobias Martin  

Hello Tobias:

I think that your garnet from "Brazil" is likely a rhodolite (a variety of pyrope) from a mine in Tocantins state. I read the comment made by Granate (Nov.18, 2009) about a material he saw with Leonilde Piovesan that might have came from Juazeiro, Bahia; it may be possible that garnets were found there but it is not a famous locality, whilst that mine in Tocantins has produced a large quantity of garnets for many years.

Rhodolites have a purplish-red color; if your specimen is just red or brownish-red it is not a rhodolite. I have checked "rhodolite" on Mindat and this important locality is not mentioned; the owner of the mine is Osório Neto, as his business is named Colorgemas (Belo Horizonte and Hong Kong), I could not talk to him to get more details about it, as soon as I get it I will inform you and I will also post a photo and a note on Mindat.

Luiz
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Carles Millan
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PostPosted: Mar 28, 2010 10:31    Post subject: Re: Collection of Tobias Martin  

Tobias Martin wrote:
the crystal form is quite interesting. I've seen such a form never before on a calcite specimen, and it rather reminds me of some topaz crystals i've seen.

Interesting crystallography. Calcite is often surprising.
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PostPosted: Mar 28, 2010 12:29    Post subject: Re: Collection of Tobias Martin  

Yes, Carles, but it's a pity that these crystals occur not very large and not in really fine quality there. But at least they have a strange form ;-)

Luiz, thank you for your information. But i finally decided to take the large garnet crystal out of the displayed collection. I don't like to have specimens without locality on display, and i will not present a specimen which could be from Idaho OR "somewhere from Brazil". I had several infos about various localities, and each time my garnet fitted them theoretically, due to the similarity to the reference specimens. But nevertheless i would appreciate to be informed about useful news. I don't have much hope of finally finding the locality without doubts, but any hint is welcome, thank you in anticipation! Even to know that it is really from Brazil (without further information) would be great, for it was displayed at the museum with a label that said "Brazil".

Here's another specimen from Namibia: Sceptre amethyst on matrix from Brandberg, Erongo region. The longest crystals measure 25 mm, overall size of the specimen is 80 x 50 x 40 mm.



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jamesb




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PostPosted: Mar 29, 2010 00:24    Post subject: Re: Collection of Tobias Martin  

I like it !
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Andreas Gerstenberg




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PostPosted: Mar 30, 2010 06:02    Post subject: Re: Collection of Tobias Martin  

Nice Alme calcite! Did only know the reddish almost opaque scalenohedrons there...
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