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28 Nov-05:45:23 Re: new generation for picture - ploum (Ploum)
28 Nov-05:42:38 Re: cannon slr with stacking (Robert Saunders)
28 Nov-04:00:00 Re: collection of volkmar stingl (Volkmar Stingl)
28 Nov-03:32:49 Re: cannon slr with stacking (Am Mizunaka)
28 Nov-00:05:40 Re: cannon slr with stacking (Fiebre Verde)
27 Nov-23:30:31 Re: cannon slr with stacking (Peter Lemkin)
27 Nov-13:58:06 Re: cannon slr with stacking (Fiebre Verde)
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27 Nov-11:18:52 Re: collection of volkmar stingl (Volkmar Stingl)
27 Nov-10:27:52 Re: collection of michael shaw (Michael Shaw)
27 Nov-05:02:15 The mizunaka collection - fluorite (Am Mizunaka)
26 Nov-17:19:00 A brief introduction to the rio site at cabeco do piao - silvia's collection (Silvia)
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25 Nov-10:27:48 Epitaxial or twinned rutile? (Josele)
24 Nov-15:05:05 Siderite and fluorite - silvia's collection (Silvia)
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Collection of Fiebre Verde
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Fiebre Verde




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PostPosted: Feb 25, 2020 16:51    Post subject: Re: Collection of Fiebre Verde  

Philippe Durand wrote:
well done Gérard. your collection is great by aesthetic and by knowledge on this specific green topic

Merci pour ton mot Philippe.
When I started this collection more than 20 years ago in Colombia, I thought emeralds would quickly bore me. 20 years later, here I am, still looking for special specimens or oddities.
And the odds are that, in the 20 years to come (and if everything goes smoothly) I will still be suffering from that terrible green fever.
Gérard
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Fiebre Verde




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PostPosted: Mar 18, 2021 16:45    Post subject: Re: Collection of Fiebre Verde - Peñas Blancas (#776)  

It's been a while...
Group of two crystals in parallel growth plus a couple of isolated crystals on a brecciated matrix dominated by large calcite rhombs.



IMG_4472nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
Peñas Blancas Mine, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 41mm x 21mm x 19mm, group=7mm
 Description:
 Viewed:  1639 Time(s)

IMG_4472nb.JPG


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Tobi
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PostPosted: Mar 19, 2021 02:29    Post subject: Re: Collection of Fiebre Verde  

Hi Gérard,

Great that our Green Star is back :-)
And what a gorgeous emerald again, wow!!!

Regards
Tobi
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Fiebre Verde




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PostPosted: Mar 19, 2021 03:13    Post subject: Re: Collection of Fiebre Verde  

Tobi wrote:
Hi Gérard,

great that our Green Star is back :-)
And what a gorgeous emerald again, wow!!!

Regards
Tobi

Greatly appreciate your kind words Tobi!
I should be able to post more regularly again from now on.
Take care
Gérard
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Fiebre Verde




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PostPosted: Sep 24, 2021 14:45    Post subject: Re: Collection of Fiebre Verde (Panjshir #42)  

Group of intergrown beryl crystals on a metamorphic schist.

Afghan emeralds can be just as good as their Colombian counterparts.
You just need to be able to find some.

Without knowing the Panjsher district (Khenj, Paryan, Bazarak) and even less the mine where this specimen comes from, I have (reluctantly) selected the only Panjsher locality available in the list.
Maybe a good idea would be to create a "Panjsher Province" entry in the Afghanistan locality list.
______________________________________

Done



Panjshir.JPG
 Mineral: Beryl (variety emerald)
 Locality:
Panjsher Province, Afghanistan
 Dimensions: 40x45x29mm, largest xl=32mm
 Description:
 Viewed:  931 Time(s)

Panjshir.JPG


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Philippe Durand




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PostPosted: Sep 27, 2021 14:10    Post subject: Re: Collection of Fiebre Verde  

nice to see some green stuff again :)
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Tobi
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PostPosted: Sep 28, 2021 08:09    Post subject: Re: Collection of Fiebre Verde (Panjshir #42)  

Fiebre Verde wrote:
Afghan emeralds can be just as good as their Colombian counterparts.
And your photo proves this. What a wonderful emerald specimen, incredible colour, good contrast and perfect aesthetics overall. In my opinion, though not completely gemmy, as good as an emerald specimen can get!

Wow!

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Tobi
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Fiebre Verde




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PostPosted: Sep 28, 2021 09:30    Post subject: Re: Collection of Fiebre Verde  

Thanks for your appreciation Philippe and Tobi!

Colombian and Panjshir emeralds share many similarities (origin of the mineralizing fluids, fluid inclusions, tectonic-metamorphic-related type of deposit).
It's no surprise that they also share the same visual aesthetic.

Gérard
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Fiebre Verde




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PostPosted: Oct 27, 2021 13:56    Post subject: Re: Collection of Fiebre Verde (Muzo #815)  

A complete doubly terminated trapiche crystal from Muzo.
Complete trapiche pattern parallel to the c-axis is observed in this crystal, which is fairly uncommon.
For those interested, a thorough description of this trapiche crystal in presented in:
http://www.gia.edu/doc/Spring-2019-Gems-Gemology-v2.pdf (pp. 156-158)
(Link normalized by FMF)

Gérard



IMG_5417nb.JPG
 Mineral: Beryl (variety emerald)
 Locality:
Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 15.4 mm x 5.2 mm
 Description:
 Viewed:  466 Time(s)

IMG_5417nb.JPG



Schmetzer.jpg
 Mineral: Beryl (variety emerald)
 Locality:
Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 15.4 mm x 5.2 mm
 Description:
 Viewed:  459 Time(s)

Schmetzer.jpg


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Romain M




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PostPosted: Nov 02, 2021 18:25    Post subject: Re: Collection of Fiebre Verde  

Magnifiques photos Gérard, félicitations pour cette superbe collection

Plenty of wonderful masterpieces in all the pages but this trapiche crystal is really something I have never seen before. Generally, they are deeply embed in the shist matrix, with no visible faces. From what I see, the faces are natural here (unpolished), right?

Incredible!

By the way, this trapiche patern remind me of a phenomenon we sometimes observe in red beryl (hourglass patern) but I think it is much more of a color zoning rather than a trapiche patern for these ones.
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Fiebre Verde




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PostPosted: Nov 03, 2021 03:58    Post subject: Re: Collection of Fiebre Verde  

Romain M wrote:
Magnifiques photos Gérard, félicitations pour cette superbe collection

Plenty of wonderful masterpieces in all the pages but this trapiche crystal is really something I have never seen before. Generally, they are deeply embed in the shist matrix, with no visible faces. From what I see, the faces are natural here (unpolished), right?

Incredible!

By the way, this trapiche patern remind me of a phenomenon we sometimes observe in red beryl (hourglass patern) but I think it is much more of a color zoning rather than a trapiche patern for these ones.

Merci pour tes compliments Romain – je suis ravi de savoir que tu apprécies cette collection !

This trapiche crystal is certainly an oddity.
Emerald trapiche are not that uncommon in Colombia but as you said, they usually come embedded in their carbonaceous matrix (and more often sliced and polished, but that’s a different story).
Complete trapiche crystals are seldom seen, and when they are, the crystals are coated with carbonaceous material which makes them opaque and misshapen.
This crystal has been closely examined and is definitely unpolished.
As you have probably already found, there are a couple of good references on the formation of trapiche emeralds which have been published over the recent years.

I have never heard about trapiche-like red beryl. Do you maybe have a reference?
Don't hesitate to send me a PM in order to avoid clogging the discussion.

Gérard
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