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Tobi
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Joined: 07 Apr 2009
Posts: 4248
Location: Germany
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 Posted: Feb 02, 2015 11:29 Post subject: Re: Collection of Carles Millan |
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I like on that specimen that the fluorites seem to have a deep blue colour instead of the usual purple. I know there were several pockets with such blue fluorites, and I think they were much rarer than the purple ones. So the specimen combines rarity and a nice paragenesis with a prominent previous owner - congratulations 👍
Tobi
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Carles Millan
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Joined: 05 May 2007
Posts: 1536
Location: Catalonia
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| Posted: Feb 02, 2015 14:34 Post subject: Re: Collection of Carles Millan |
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| Tobi wrote: | | ...a nice paragenesis with a prominent previous owner |
Tobi, I have serious doubts that my fluorite and doctor Steve Neely were generated at about the same time at exactly the same place :-)
Many thanks for your always kind comments anyway.
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Tobi
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Posts: 4248
Location: Germany
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| Posted: Feb 02, 2015 15:19 Post subject: Re: Collection of Carles Millan |
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Took me a moment to get that pun, Carles ;-)
But to avoid the misunderstanding, I will correct my | Quote: | | So the specimen combines rarity and a nice paragenesis with a prominent previous owner |
to:
So the specimen combines rarity, a nice paragenesis and a prominent previous owner ;-)
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Carles Millan
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Joined: 05 May 2007
Posts: 1536
Location: Catalonia
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| Posted: Apr 10, 2015 08:38 Post subject: Collection of Carles Millan - Xuebaoding combo |
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Beryl, cassiterite, scheelite, albite, muscovite
Uncommon paragenesis of beryl, scheelite, cassiterite and albite on a bed of crystallized muscovite, all in a matrix slab made of a granitic rock. The beryl crystallography is also remarkable since they are hexagonal prisms, up to 28 mm wide, lacking the typical side faces. Only the two pinacoids {0001} and a second order pyramid {1121} can be seen, both faces forming an angle near 45º (π/4 rad). The beryl crystals are transparent and only very slightly blue, almost colorless. There is a very neat and unusual elongated grouping of black cassiterite 53 mm long and a partly gemmy orange scheelite crystal 14 mm wide. Overall dimensions: 115 mm x 84 mm x 34 mm. Weight: 342 g. Undamaged (at least to the naked eye).
Mt Xuebaoding, Pingwu Co., Mianyang Prefecture, Sichuan Province, China.
Photos copyright © Carles Millan. Reproduction allowed as long as the author's name is cited and the image not modified. Creative Commons Attribution Licence - Some Rights Reserved.
My Personal Site
| Mineral: | Beryl, cassiterite, scheelite, albite, muscovite |
| Locality: | | Mount Xuebaoding, Pingwu, Mianyang Prefecture, Sichuan Province, China |  |
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| Dimensions: | 115 mm x 84 mm x 34 mm |
| Description: |
| Captured with a smartphone LG G3 D855 with 13MP and processed with Paint Shop Pro Ultimate Photo X2 |
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41611 Time(s) |
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| Mineral: | Beryl, cassiterite, scheelite, albite, muscovite |
| Locality: | | Mount Xuebaoding, Pingwu, Mianyang Prefecture, Sichuan Province, China | |
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| Dimensions: | 115 mm x 84 mm x 34 mm |
| Description: |
| Captured with a camera Canon G10 with 14.7MP and processed with Paint Shop Pro Ultimate Photo X2 |
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| Viewed: |
41537 Time(s) |
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| Mineral: | Beryl, cassiterite, scheelite, albite, muscovite |
| Locality: | | Mount Xuebaoding, Pingwu, Mianyang Prefecture, Sichuan Province, China | |
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| Dimensions: | 115 mm x 84 mm x 34 mm |
| Description: |
| Some thoughts about the beryl crystallograpy.Captured with a smartphone LG G3 D855 with 13MP and processed with Paint Shop Pro Ultimate Photo X2. Graphics created and/or processed with Paint Shop Pro Ultimate Photo X2 |
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41459 Time(s) |
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Josele
Joined: 10 Apr 2012
Posts: 410
Location: Tarifa, Spain
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| Posted: Apr 10, 2015 11:44 Post subject: Re: Collection of Carles Millan |
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Nice piece!
Did you check fluorescence under short wave UV? Some beryl from this locality are somewhat fluorescent due to small, not visible at naked eye, scheelite inclusions. This one, having a scheelite crystal very close, is a good candidate...
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Carles Millan
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Joined: 05 May 2007
Posts: 1536
Location: Catalonia
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| Posted: Apr 10, 2015 13:57 Post subject: Re: Collection of Carles Millan |
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| Josele wrote: | Nice piece!
Did you check fluorescence under short wave UV? Some beryl from this locality are somewhat fluorescent due to small, not visible at naked eye, scheelite inclusions. This one, having a scheelite crystal very close, is a good candidate... |
Hi, Josele!
I didn't. But I'll try as soon as possible. Thanks for your comments.
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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| Posted: Apr 10, 2015 15:28 Post subject: Re: Collection of Carles Millan |
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| Nice combo Carles. All you need is an apatite, and you would have everything.
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Carles Millan
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Joined: 05 May 2007
Posts: 1536
Location: Catalonia
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| Posted: Apr 10, 2015 16:09 Post subject: Re: Collection of Carles Millan |
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| GneissWare wrote: | | Nice combo Carles. All you need is an apatite, and you would have everything. |
Of course! And a good kësterite crystal too. And then a tube of Super Glue to attach them.
Many thanks for your words.
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GneissWare
Joined: 07 Mar 2008
Posts: 1287
Location: California
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| Posted: Apr 10, 2015 16:49 Post subject: Re: Collection of Carles Millan |
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| Carles Millan wrote: | And then a tube of Super Glue to attach them.
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They are very good at gluing things together over there!!! You knew that was exactly what I was thinking when I wrote the comment.
I don't think I have ever seen a combo with this particular group of minerals. Great find.
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Tobi
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Joined: 07 Apr 2009
Posts: 4248
Location: Germany
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| Posted: Apr 11, 2015 03:23 Post subject: Re: Collection of Carles Millan |
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| GneissWare wrote: | | I don't think I have ever seen a combo with this particular group of minerals. |
Me neither! Very beautiful specimen, Carles, congratulations!
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Carles Millan
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Joined: 05 May 2007
Posts: 1536
Location: Catalonia
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| Posted: Apr 11, 2015 03:42 Post subject: Re: Collection of Carles Millan |
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| Tobi wrote: | | Very beautiful specimen... |
Thank you, Tobi. I'm very glad you like it!
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Martin Rich
Joined: 15 Aug 2013
Posts: 127
Location: Lower Austria
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| Posted: Apr 16, 2015 16:45 Post subject: Re: Collection of Carles Millan |
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Hello Carles!
Hard to tell if it is a hexagonal bipyramide of first order (e.g. {10-11}) or of second order (e.g. {11-21}, {11-22}) without goniometric measurement. Anyway, an excellent specimen and photo of course!
Martin
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Carles Millan
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Joined: 05 May 2007
Posts: 1536
Location: Catalonia
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| Posted: Apr 17, 2015 04:08 Post subject: Re: Collection of Carles Millan |
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| Martin Rich wrote: | | Hard to tell if it is a hexagonal bipyramide of first order (e.g. {10-11}) or of second order (e.g. {11-21}, {11-22}) without goniometric measurement. Anyway, an excellent specimen and photo of course! |
Hi, Martin!
First of all, thank you for your kind comments about my specimen.
However, and although I'm not by far an expert on crystallography, I have to disagree with your opinion on the pyramid order issue. According to the old book A Textbook of Mineralogy, by Edward S. Dana and William E. Ford, in the reference to the beryl species, the angle that the pinacoid and the first order pyramid form is ca. 30º (π/6 rad) while this angle with the second order pyramid is ca. 45º (π/4 rad).
I'm a bit shortsighted and suffer with presbyopia and astigmatism (I'm no longer a teen) but fortunately I'm still well able to differentiate such angles with my naked eye. No need of a goniometer, that anyway I don't own.
| Description: |
| _See angles formed by the pinacoid and the second order pyramid in a beryl crystal (values are approximate) |
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43442 Time(s) |
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Carles Millan
Site Admin
Joined: 05 May 2007
Posts: 1536
Location: Catalonia
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| Posted: Jun 21, 2015 11:47 Post subject: Collection of Carles Millan - Wulfenite from Los Lamentos |
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Wulfenite, calcite
Group of typical Los Lamentos tabular tetragonal wulfenite crystals with a deep honey color, up to 22 mm wide and 10 mm thick, sitting on a matrix of calcite. Overall size: 93 mm x 87 x 59 mm. Weight: 305 g. Ex Emilio Ródenas collection.
Los Lamentos Mts, Mun. de Ahumada, Chihuahua, Mexico.
Photos copyright © Carles Millan. Reproduction allowed as long as the author's name is cited and the image not modified. Creative Commons Attribution Licence - Some Rights Reserved.
My Personal Site
| Mineral: | Wulfenite, calcite |
| Locality: | | Los Lamentos Mountain Range, Municipio Ahumada, Chihuahua, Mexico | |
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| Dimensions: | 93 mm x 87 x 59 mm |
| Description: |
| Captured with a smartphone LG G3 D855 with 13MP and processed with Paint Shop Pro X6 |
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43384 Time(s) |
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Enrique Llorens
Joined: 02 Jun 2011
Posts: 408
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| Posted: Jun 22, 2015 01:46 Post subject: Re: Collection of Carles Millan |
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Very nice Carles.
Un abrazo. Enrique.
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