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Collection of Carles Millan
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Carles Millan
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PostPosted: Apr 05, 2022 07:58    Post subject: Collection of Carles Millan: Celestine from Madagascar  

Celestine - SrSO4

Pale blue transparent crystals of celestine showing an uncommon habit for the species rarely found in this deposit. The crystals are elongated and tapered, with steep pyramidal faces that go to the upper vertex. No damage.

The pyramid is actually rhombic in section and may be formed by four microstepped triangular faces with alternating {110} and {111} Miller indices. But they show fairly flat surfaces to the naked eye. From a kind suggestion by Josele.

According to the book Moore's Compendium of Mineral Discoveries by Thomas P. Moore, 2016, vol. 1, page 351, specimens with such a particular habit were first found in February 2006 at the Katsepy mine near Majunga, Sakoany.

From Sakoany deposit, Katsepy, Mitsinjo, Boeny, Madagascar.

Overall size: 85 mm x 65 mm. Main crystal: 65 mm. Mass: 192 g.

Unless otherwise noted, all photos are copyright by Carles Millan. Reproduction allowed as long as the author's name is cited and the image not modified (if it is not too much to ask...). Creative Commons Attribution Licence - Some Rights Reserved.

Software, photos, and maps






6165M-celestine2.jpg
 Mineral: Celestine
 Locality:
Sakoany deposit, Katsepy Commune, Mitsinjo District, Boeny Region, Mahajanga (Majunga) Province, Madagascar
 Dimensions: 85 mm x 65 mm. Main crystal: 65 mm. Mass: 192 g
 Description:
Frontal view. Note that the second edge visible from the left is actually on the back (watch video)
 Viewed:  13750 Time(s)

6165M-celestine2.jpg



6165M-celestine3.jpg
 Description:
Rear view. Note that the second edge visible from the right is actually on the front (watch video)
 Viewed:  13761 Time(s)

6165M-celestine3.jpg


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Don Lum




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PostPosted: Apr 05, 2022 09:04    Post subject: Re: Collection of Carles Millan  

Perfect and beautiful specimen, Carles, congratulations.
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Tobi
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PostPosted: Apr 05, 2022 09:30    Post subject: Re: Collection of Carles Millan: Celestine from Madagascar  

Nice to see something new from you, Carles. A very good specimen of celestite, in my opinion an outstanding one. The Sakoany celestites often have not the best reputation among collectors, the same as with amethyst from Brazil or Uruguay or apophyllite from India: There's so much of it and only very few of them stand out. Your specimen definitely does stand out - even literally, when you look at the shape ;-)

Wonderful isolated crystal, damage-free, transparent, blue - and with an uncommon form. And the way it sits on the matrix, someone did a good job trimming this one!

A great addition to your collection and a perfect example for a common thing that is quite uncommon for it's great quality and aesthetics!

Congratulations & best regards
Tobi
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Carles Millan
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PostPosted: Apr 05, 2022 13:08    Post subject: Re: Collection of Carles Millan  

Don Lum wrote:
Perfect and beautiful specimen, Carles, congratulations.

Don, I'm really content that you like it. You own many excellent (and expensive) specimens that most of us enjoy when posted.
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Carles Millan
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PostPosted: Apr 05, 2022 13:10    Post subject: Re: Collection of Carles Millan  

Tobi, you almost always write a full journalistic review of my posted specimens so I must be very grateful.

You are right, some mineral specimens, due to their abundance, are mostly undervalued. Brazilian amethysts and Indian zeolites for instance, as you say. Some people I've read about think Madagascar celestines are the best in the world, and I agree. But since hundreds of thousands are available on the market, their prices are very low. I chose this one because of its singularity.
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Michael Shaw
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PostPosted: Apr 06, 2022 17:45    Post subject: Re: Collection of Carles Millan  

Carles, this is one of the most aesthetic celestines from Madagascar that I have seen. I love the unusual crystal habit.

Michael
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Carles Millan
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PostPosted: Apr 07, 2022 03:12    Post subject: Re: Collection of Carles Millan  

Michael, I bought it just for that particular habit. You are very lucky to have such a magnificent collection. Thanks for your kind comment.
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silvia




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PostPosted: Apr 07, 2022 14:33    Post subject: Re: Collection of Carles Millan: Celestine from Madagascar  

Carles Millan wrote:
Celestine - SrSO4

Pale blue transparent crystals of celestine showing an uncommon habit for the species rarely found in this deposit. The crystals are elongated and tapered, with steep pyramidal faces that go to the upper vertex. No damage.

From Sakoany deposit, Katsepy, Mitsinjo, Boeny, Madagascar.

Overall size: 85 mm x 65 mm. Main crystal: 65 mm. Mass: 192 g.

A brief note from me (not an expert) on crystallography: the steep faces form a sharp pyramid with a rhombic section. I think the Miller index of such faces could be {410}, also present in some barite crystals.

Unless otherwise noted, all photos are copyright by Carles Millan. Reproduction allowed as long as the author's name is cited and the image not modified (if it is not too much to ask...). Creative Commons Attribution Licence - Some Rights Reserved.

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Hello Carles:

It is a truly beautiful piece. In the periodic table of the chemical elements it lies between Gypsum and Barite.

Did you see the piece before it was trimmed? We have a few large (+20 cm) geodes of Celestine from Madagascar containing some very nice large crystals but I think it takes a lot of skill to trim a specimen to the quality of your piece.

All the best

Silvia
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Carles Millan
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PostPosted: Apr 07, 2022 15:18    Post subject: Re: Collection of Carles Millan: Celestine from Madagascar  

silvia wrote:
It is a truly beautiful piece. In the periodic table of the chemical elements it lies between Gypsum and Barite. Did you see the piece before it was trimmed? We have a few large (+20 cm) geodes of Celestine from Madagascar containing some very nice large crystals but I think it takes a lot of skill to trim a specimen to the quality of your piece.

Hello Silvia!

Thanks for your interesting comments.
Yes, strontium is chemically very close to calcium and barium. Their sulphates (anhydrite, celestine, and barite) share many properties, especially the orthorhombic crystal system.
No, I didn't see it before trimming.To obtain one from your specimens safely you need a lot of experience and some special tools as well. Otherwise, the chances of destroying them are very high. Be careful.
Good luck!
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PostPosted: Apr 09, 2022 05:49    Post subject: Re: Collection of Carles Millan  

Beautiful and special Celestine Carles
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Carles Millan
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PostPosted: Apr 09, 2022 14:09    Post subject: Re: Collection of Carles Millan  

Enrique Llorens wrote:
Beautiful and special Celestine Carles

Hello!
I'm very glad that you like it. Thank you for your compliments.
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PostPosted: Apr 16, 2022 06:06    Post subject: Collection of Carles Millan: Celestine from Madagascar  

Celestine - SrSO4

Just one among hundreds of thousands of celestine specimens from Madagascar (low price but high quality).

A typical group of pale blue lustrous transparent celestine crystals showing the common orthorhombic habit for the species. No damage. From Sakoany deposit, Katsepy Commune, Mitsinjo District, Boeny Region, Mahajanga (Majunga) Province, Madagascar. Overall size: 67 mm x 49 mm. Main crystal: 32 mm. Mass: 168 g.

Unless otherwise noted, all photos are copyright by Carles Millan. Reproduction allowed as long as the author's name is cited and the image not modified (if it is not too much to ask...). Creative Commons Attribution Licence - Some Rights Reserved.

Software, photos, and maps



6166M-celestine1.jpg
 Mineral: Celestine
 Locality:
Sakoany deposit, Katsepy Commune, Mitsinjo District, Boeny Region, Mahajanga (Majunga) Province, Madagascar
 Dimensions: 67 mm x 49 mm. Main crystal: 32 mm. Mass: 168 g
 Description:
 Viewed:  13235 Time(s)

6166M-celestine1.jpg



6166M-celestine2.jpg
 Mineral: Celestine
 Locality:
Sakoany deposit, Katsepy Commune, Mitsinjo District, Boeny Region, Mahajanga (Majunga) Province, Madagascar
 Dimensions: 67 mm x 49 mm. Main crystal: 32 mm. Mass: 168 g
 Description:
 Viewed:  13228 Time(s)

6166M-celestine2.jpg



6166M-celestine3.jpg
 Mineral: Celestine
 Locality:
Sakoany deposit, Katsepy Commune, Mitsinjo District, Boeny Region, Mahajanga (Majunga) Province, Madagascar
 Dimensions: 67 mm x 49 mm. Main crystal: 32 mm. Mass: 168 g
 Description:
 Viewed:  13221 Time(s)

6166M-celestine3.jpg


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Carles Millan
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PostPosted: May 01, 2022 05:56    Post subject: Collection of Carles Millan: Microcline from Colorado  

Microcline - K(AlSi3O8), quartz - SiO2

Well balanced classic combination with lustrous microcline blue-green crystals aesthetically set among translucent smoky quartz crystals that add a nice color contrast to the specimen. Pristine, not damaged, unrepaired.

From Pikes Peak, El Paso County, Colorado, USA.

Overall size: 85 mm x 76 mm. Main microcline crystal: 22 mm. Main quartz crystal: 23 mm. Mass: 256 g.


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8582-microcline1.jpg
 Mineral: Microcline, Quartz
 Locality:
Pikes Peak, El Paso County, Colorado, USA
 Dimensions: 85 mm x 76 mm. Main microcline crystal: 22 mm. Main quartz crystal: 23 mm. Mass: 256 g
 Description:
 Viewed:  12988 Time(s)

8582-microcline1.jpg


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Sante Celiberti




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PostPosted: May 01, 2022 06:32    Post subject: Re: Collection of Carles Millan  

Outstanding quality.
The Amazonite looks translucent.
Congratulations.
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Carles Millan
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PostPosted: May 01, 2022 09:37    Post subject: Re: Collection of Carles Millan  

Sante Celiberti wrote:
Outstanding quality. The Amazonite looks translucent. Congratulations.

Hi Sante

The crystals are not actually translucent, but I think they would be if they were much thinner.
Glad you like it. Thank you!
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Don Lum




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PostPosted: May 01, 2022 11:48    Post subject: Re: Collection of Carles Millan  

Outstanding specimen in both quality and size. Congratulations Carles.
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PostPosted: May 01, 2022 12:00    Post subject: Re: Collection of Carles Millan  

Beautiful specimen Carles !!!!
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Carles Millan
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PostPosted: May 01, 2022 13:45    Post subject: Re: Collection of Carles Millan  

Don and Enrique, many thanks for your kind comments.
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Dany Mabillard




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PostPosted: May 01, 2022 15:19    Post subject: Re: Collection of Carles Millan  

What a beauty and an excellent repartition between Microcline and Quartz. Just fantastic.
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PostPosted: May 02, 2022 01:55    Post subject: Re: Collection of Carles Millan  

I agree with the others, Carles - a very aesthetic specimen in wonderful composition of the two minerals, wow!
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