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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:  12312 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:
Panjshir Province, Afghanistan
 Dimensions: 40x45x29mm, largest xl=32mm
 Description:
 Viewed:  11626 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!

Regards
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:  11159 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:  11122 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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Fiebre Verde




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PostPosted: Jul 21, 2022 14:58    Post subject: Re: Collection of Fiebre Verde - Cunas (#827)  

Small is beautiful...


IMG_5425_nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Dolomite
 Locality:
La Pita mining district, Cunas Mine, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 24 x 18 x 24 mm, xl=9 x 5 mm
 Description:
With grey opalescent dolomite
 Viewed:  9247 Time(s)

IMG_5425_nb.JPG


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Romain M




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PostPosted: Jul 22, 2022 17:11    Post subject: Re: Collection of Fiebre Verde  

Superb Gérard! Wonderful balance, very cute and bright thunbnail
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Fiebre Verde




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PostPosted: Jul 23, 2022 02:20    Post subject: Re: Collection of Fiebre Verde  

Romain M wrote:
Superb Gérard! Wonderful balance, very cute and bright thunbnail

Merci Romain, I appreciate your comments!
This piece is the last entered in my collection.
Well balanced specimens like this one are usually not difficult to photograph.
The color of the emerald is better in person.
It passed successfully the 'dim light test': the crystal still glows in a poor lighting environment.
Hope to post more in the near future.
Gérard
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Fiebre Verde




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PostPosted: Jul 25, 2022 16:25    Post subject: Re: Collection of Fiebre Verde - Chivor (#827)  

Doubly terminated crystal from Chivor.


IMG_5491nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Albite (var. Cleavelandite), Pyrite
 Locality:
Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 24 x 14 x 24 mm, main xl = 10 mm
 Description:
 Viewed:  8904 Time(s)

IMG_5491nb.JPG



IMG_5529nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Albite (var. Cleavelandite), Pyrite
 Locality:
Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 24 x 14 x 24 mm, main xl = 10 mm
 Description:
 Viewed:  8910 Time(s)

IMG_5529nb.JPG


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silvia




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PostPosted: Jul 25, 2022 16:45    Post subject: Re: Collection of Fiebre Verde  

A really beautiful Emerald specimens. I would be a lot happier to have it on my finger as a ring!

All the best.

Silvia
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Fiebre Verde




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PostPosted: Jul 25, 2022 16:58    Post subject: Re: Collection of Fiebre Verde  

silvia wrote:
A really beautiful Emerald specimens. I would be a lot happier to have it on my finger as a ring!

All the best.

Silvia

Thank you Silvia.
The prospect to have it as a ring is probably the best compliment you can make.
It glows even in dim light!
Gérard
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Fiebre Verde




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PostPosted: Jan 07, 2023 09:04    Post subject: Re: Collection of Fiebre Verde - Chivor (#861)  

Host rock and original beryl crystal were broken up into several pieces due to surrounding pressure.
A good indication that this specimen was formed and shaped by intense geological upheavals.
Exceptional luster and glow, with no clear secondary hue.
Crystal termination, also split up into several fragments, shows cavities.
Host rock is coated with tiny calcite crystals.
Oxidized pyrite, on a rusty black shale.



IMG_5843ab.JPG
 Mineral: Beryl (variety emerald), Calcite, Pyrite
 Locality:
Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 68 x 50 x 14 mm - main xl fragment 21 mm
 Description:
 Viewed:  6993 Time(s)

IMG_5843ab.JPG


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Romain M




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PostPosted: Jan 07, 2023 09:53    Post subject: Re: Collection of Fiebre Verde  

Incredible aesthetic Gérard! What a find. Special recent find in Chivor?
Wonderful color, interesting shape. I also see iridescent calcite and the brown crystals might be limonized pyrite?
Would be nice to see the cavities in the smaller fragments :)
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Fiebre Verde




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PostPosted: Jan 07, 2023 12:25    Post subject: Re: Collection of Fiebre Verde  

Romain M wrote:
Incredible aesthetic Gérard! What a find. Special recent find in Chivor?
Wonderful color, interesting shape. I also see iridescent calcite and the brown crystals might be limonized pyrite?
Would be nice to see the cavities in the smaller fragments :)

Thanks for your appreciation Romain!

I haven't seen anything close to this specimen during my recent stay in Colombia.
I have been told it's from a recent find (less than a year) but it's impossible to crosscheck.
The only thing I believe is that it's not glued and that it's indeed from Chivor although the color doesn't contain the common blue hue associated with that locality.

You are right about the iridescent calcite and the limonized pyrite.

Gérard



IMG_5961ab.JPG
 Mineral: Beryl (variety emerald), Calcite, Pyrite
 Locality:
Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 68 x 50 x 14 mm - main xl fragment 21 mm
 Description:
Basal faces show deep indentations (or deep cavities) which are surrounded by shells or rims of emerald.
Note the host rock fragment standing between the two beryl crystals on the left.
 Viewed:  6921 Time(s)

IMG_5961ab.JPG


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