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ploum
Joined: 12 Nov 2007
Posts: 1398
Location: Near Annecy



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Posted: Oct 29, 2013 13:20 Post subject: Re: Munich Show (Mineralientage) 2013 |
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Hi Jordi thanks and i have others photos....
A serie with austria minerals
300-305
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ploum
Joined: 12 Nov 2007
Posts: 1398
Location: Near Annecy



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Posted: Oct 29, 2013 13:22 Post subject: Re: Munich Show (Mineralientage) 2013 |
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306-310
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ploum
Joined: 12 Nov 2007
Posts: 1398
Location: Near Annecy



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Posted: Oct 29, 2013 13:23 Post subject: Re: Munich Show (Mineralientage) 2013 |
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311-315
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jaysminerals
Joined: 28 Jun 2009
Posts: 50
Location: Bavaria



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Posted: Oct 29, 2013 13:25 Post subject: Re: Munich Show (Mineralientage) 2013 |
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Hi Jordi
Was a pleasure to see you at the booth and talk to you. I was the guy with the pyromorphite. Maybe you remember.
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ploum
Joined: 12 Nov 2007
Posts: 1398
Location: Near Annecy



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Posted: Oct 29, 2013 13:25 Post subject: Re: Munich Show (Mineralientage) 2013 |
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316-320
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ploum
Joined: 12 Nov 2007
Posts: 1398
Location: Near Annecy



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Posted: Oct 29, 2013 13:28 Post subject: Re: Munich Show (Mineralientage) 2013 |
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321-326
The End for Austria ;)
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ploum
Joined: 12 Nov 2007
Posts: 1398
Location: Near Annecy



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Posted: Oct 29, 2013 14:56 Post subject: Re: Munich Show (Mineralientage) 2013 |
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Some balls :)
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ploum
Joined: 12 Nov 2007
Posts: 1398
Location: Near Annecy



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Roger Warin

Joined: 23 Jan 2013
Posts: 1239



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Posted: Oct 30, 2013 03:14 Post subject: Re: Munich Show (Mineralientage) 2013 |
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Some minerals.
Roger.
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Aquamarine Marambaia, Carai, Jequitinhonha Valley, MG, Brazil |
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Cuprite covered by malachite Emke Mine, Ogonja (Onganja), Seeis, Khomas Region, Namibia |
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Quartz "Gwindel" Galenstock, Furka, Uri, CH |
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Tanzanite (zoisite) "Kilimanjaro" Merelani Hills, Arusha region, Tansania |
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Tourmaline Governador Valadares, Minas Gerais, Brazil |
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bob kerr

Joined: 13 Nov 2011
Posts: 638
Location: Monroeville PA



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Posted: Oct 30, 2013 07:31 Post subject: Re: Munich Show (Mineralientage) 2013 - Request |
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Jordi Fabre wrote: | Great photos from Ploum, but not too much texts from other FMFers. Some comments to add about the Show?
This time we are rich in images but poor in comments ;-) |
Only speaking for myself, jordi, but I just don't find golds all that interesting, and even though the quality of the photography is excellent there's just way too many gold photos. thus, no comments.
the recent photos though are MUCH more interesting - many unique localities and high quality specimens - matched by the photography.
regards,
bob
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Jordi Fabre
Overall coordinator of the Forum

Joined: 07 Aug 2006
Posts: 5070
Location: Barcelona



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Posted: Oct 30, 2013 08:11 Post subject: Re: Munich Show (Mineralientage) 2013 |
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bob kerr wrote: | Jordi Fabre wrote: | Great photos from Ploum, but not too much texts from other FMFers. Some comments to add about the Show?
This time we are rich in images but poor in comments ;-) |
Only speaking for myself, jordi, but I just don't find golds all that interesting, and even though the quality of the photography is excellent there's just way too many gold photos. thus, no comments.
the recent photos though are MUCH more interesting - many unique localities and high quality specimens - matched by the photography... |
Thank you Bob.
I mean, comments about the Show itself and made by the attendees of the Show...
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Roger Warin

Joined: 23 Jan 2013
Posts: 1239



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Posted: Oct 30, 2013 08:33 Post subject: Re: Munich Show (Mineralientage) 2013 |
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Hi,
The visit of this exhibition was impressive. Many large nuggets and extremely aesthetic gold specimens were presented. But apart from gold, there was not much explanation. Even the mass of metal was rarely given. Many protected showcases surrounding real safes containing rare historical specimens, including the “La Trobe” Nugget, 717 g, Mt McIvor, Victoria, Australia.
This nugget was raised on 1 May 1853 in the presence of Charles La Trobe, Governor of Victoria and named in his honor.
The largest nugget was “Ausrox” Nugget. It was found by metal detector early 2010, Eastern Goldfields, Western Australia. Its mass is 23.26 kg or 748 Troy ounces.
But what I don’t know is the number of samples, they were so numerous.
Roger.
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Ausrox gold nugget Eastern Goldfields, Western Australia 23.26 kg |
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Don Lum

Joined: 03 Sep 2012
Posts: 2919
Location: Arkansas



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Posted: Oct 30, 2013 10:24 Post subject: Re: Munich Show (Mineralientage) 2013 |
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Hello Ploum,
Thank you for the "gold fix." I am enjoying the many fine pictures of the gold specimens.
Thanks for your time and effort.
Don
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Peter Van Hout
Joined: 13 Feb 2013
Posts: 39
Location: Flanders


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Posted: Oct 30, 2013 14:26 Post subject: Re: Munich Show (Mineralientage) 2013 |
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@ Roger, I was told that there was a mayor problem with the printing of the original specimen labels. For that reason the organiser had to made friday morning on opening day new labels. What explains maybe why some labels where missing and why not all labels were up to date with history, weight or sizes.
For myself the gold exhibition was truly fabulous. Some of my favorite cases, Harvard Museum, Paris Museum, Mario Pauwels, Wherskhy, the german anonimous leafgold case, and the leafgolds in the vault cases. For some reason I was not impressed with some larger nuggets that I saw, for example that case with three large shapeless nuggets and the vault with the ausrox nugget; very big but also very ugly.
About the specimens who where for sale at the show then. I think that it is an illusion to build a decent, and I am not even saying a great collection without spending a fortune for each specimen. A small 35 milimeter gold specimen who took my interest was priced 5900 euro ! And in the mineral pavilion at the booth of an American dealer I noticed a specimen that was priced 12000 euro, that same specimen is on his website for sale for 12000 $ so this dealer charges an additional 38% in Münich!
So finding nice things at moderate prices for lets say my collection is not easy, even in Münich with such a very large inventory. But when I go to Münich is not only for buying things but also for learning things, and I must say that again I learned a lot with the gold exhibition.
Peter Van Hout
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Gerhard Niklasch
Joined: 27 Mar 2009
Posts: 134
Location: Munich



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Posted: Oct 30, 2013 14:42 Post subject: Re: Munich Show (Mineralientage) 2013 |
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I was particularly interested in one special exhibition that was a bit hidden behind the Collectors' Showcases… because I'll probably never again see so many shiny brass devices from my illustrious ancestor's (R.Fuess) company together in one place!
The topic was given as "Golden moments of crystallography" or "Knowledge is gold", and the focus was on the determination of optical properties of crystals: index of refraction, angle between optical axes, etc. This is why we're going to see several goniometers doing double duty as refractometers.
The exhibits had been prepared and annotated by Dr Olaf Medenbach of Ruhr-Univ.Bochum, Germany.
Enjoy!
Gerhard
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Beginning with something small, here's a stage goniometer (Fedorow stage) for use a a microscope accessory. |
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In Liebisch's refractometer, mounted here on a "Universal apparatus" after Groth, the index of refraction is obtained from the angle of total reflection, with the specimen (cut, ground and polished to a prism) in air (Fuess c.1890) |
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Close-up of the Liebisch device. |
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The Kohlrausch refractometer uses the angle of total reflection measured with the specimen immersed in a highly refractive liquid. It is mounted on a Fuess mark I goniometer, a model manufactured between 1880 and 1920. |
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The Fuess Mark II goniometer was very popular at the time. Here's one from the 1890s, configured for use as a direct refractometer: one measures the minimal deflection angle of light passing through an equilateral triangular prism. |
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Close-up of the central tip-tilt-xy stage with a little Aragonite prism mounted on it. |
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Yet another way to measure the index of refraction places one polished face of the specimen atop a precise, polished glass hemisphere, following a suggestion of Bertrand modified by Abbé. Fuess Mark III hemispherical refractometer, c.1900. |
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