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Collection of Fiebre Verde
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Fiebre Verde




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PostPosted: Jul 28, 2016 10:05    Post subject: Re: Collection of Fiebre Verde - Polveros (#592)  

Clear yellow-light green beryl crystal.
Calcite crystals set in a limonized-brecciated matrix.



IMG_4416nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
La Pita mining district, Polveros Mine, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 46x25x30mm, xl=7x7mm
 Description:
 Viewed:  71729 Time(s)

IMG_4416nb.JPG



IMG_4418nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
La Pita mining district, Polveros Mine, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 46x25x30mm, xl=7x7mm
 Description:
 Viewed:  71762 Time(s)

IMG_4418nb.JPG



IMG_4433nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
La Pita mining district, Polveros Mine, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 46x25x30mm, xl=7x7mm
 Description:
 Viewed:  71765 Time(s)

IMG_4433nb.JPG


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Fiebre Verde




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PostPosted: Jul 30, 2016 05:16    Post subject: Re: Collection of Fiebre Verde - La Pita (#601)  

A classic specimen from La Pita.
Host rock is black shale.



IMG_3865nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Dolomite
 Locality:
La Pita mining district, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 53x38x34mm, xl=5x4mm
 Description:
 Viewed:  71669 Time(s)

IMG_3865nb.JPG



IMG_3861nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Dolomite
 Locality:
La Pita mining district, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 53x38x34mm, xl=5x4mm
 Description:
 Viewed:  71641 Time(s)

IMG_3861nb.JPG



IMG_4586nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Dolomite
 Locality:
La Pita mining district, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 53x38x34mm, xl=5x4mm
 Description:
 Viewed:  71667 Time(s)

IMG_4586nb.JPG



IMG_4595nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Dolomite
 Locality:
La Pita mining district, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 53x38x34mm, xl=5x4mm
 Description:
 Viewed:  71659 Time(s)

IMG_4595nb.JPG



IMG_4636nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Dolomite
 Locality:
La Pita mining district, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 53x38x34mm, xl=5x4mm
 Description:
 Viewed:  71624 Time(s)

IMG_4636nb.JPG



IMG_4644nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Dolomite
 Locality:
La Pita mining district, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 53x38x34mm, xl=5x4mm
 Description:
 Viewed:  71642 Time(s)

IMG_4644nb.JPG


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Philippe Durand




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PostPosted: Jul 30, 2016 14:30    Post subject: Re: Collection of Fiebre Verde  

I Like the way that you present your specimen, from a wide view to a more and more close view. Really nice to fully appreciate a piece
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Fiebre Verde




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PostPosted: Jul 30, 2016 16:20    Post subject: Re: Collection of Fiebre Verde  

Philippe Durand wrote:
I Like the way that you present your specimen, from a wide view to a more and more close view. Really nice to fully appreciate a piece


Thank you Philippe - I am glad to hear you appreciate this approach!
To id my specimens, I often take lots of shots from wide views to close-ups, exploring different lighting and using various angles.
And when reviewing the result, I find it's always a dilemma to choose just one picture that summarizes it all.
One of the beauty of this forum is that it gives the option to go beyond that one summary picture (Although I do realize that I sometimes abuse that freedom a little...)
Gérard
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Fiebre Verde




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PostPosted: Jul 31, 2016 13:50    Post subject: Re: Collection of Fiebre Verde - La Pita (#611)  

Beryl crystals on a calcite matrix.
The smallest crystal (13mm) is flawless and transparent.



IMG_4706nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
La Pita mining district, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 46x85x20mm, xls=26, 16 & 13mm
 Description:
 Viewed:  71482 Time(s)

IMG_4706nb.JPG



IMG_4782nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
La Pita mining district, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 46x85x20mm, xls=26, 16 & 13mm
 Description:
 Viewed:  71528 Time(s)

IMG_4782nb.JPG



IMG_4722nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
La Pita mining district, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 46x85x20mm, xls=26, 16 & 13mm
 Description:
 Viewed:  71499 Time(s)

IMG_4722nb.JPG



IMG_4714nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
La Pita mining district, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 46x85x20mm, xls=26, 16 & 13mm
 Description:
 Viewed:  71547 Time(s)

IMG_4714nb.JPG



IMG_4754nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
La Pita mining district, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 46x85x20mm, xls=26, 16 & 13mm
 Description:
 Viewed:  71538 Time(s)

IMG_4754nb.JPG



IMG_4736nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
La Pita mining district, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 46x85x20mm, xls=26, 16 & 13mm
 Description:
 Viewed:  71519 Time(s)

IMG_4736nb.JPG


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Fiebre Verde




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PostPosted: Aug 03, 2016 07:54    Post subject: Re: Collection of Fiebre Verde - Chivor (#91)  

There are sprays of acicular aragonite all over the specimen.
White and colorless calcite set in a brecciated matrix with patches of black shale and grey limestone.



IMG_4840nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Aragonite
 Locality:
Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 75x63x64mm, main xl=11x9mm
 Description:
 Viewed:  50268 Time(s)

IMG_4840nb.JPG



IMG_4864nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Aragonite
 Locality:
Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 75x63x64mm, main xl=11x9mm
 Description:
 Viewed:  50263 Time(s)

IMG_4864nb.JPG


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Fiebre Verde




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PostPosted: Aug 05, 2016 07:59    Post subject: Re: Collection of Fiebre Verde - Chivor (#503)  

In Colombia, the different districts and localities are known to produce emeralds that differ significantly in color, tone, and clarity.
Even if some trends have been observed it’s difficult to apply a rigid locality (or area) classification scheme based on color features alone when presented with an emerald specimen (or even worse, a faceted stone!).
Muzo emeralds are supposedly saturated, slightly yellowish green whereas Chivor emeralds are less saturated and exhibit a slight bluish tinge. But the opposite also occurs.
Color classification is mainly driven by the jewelry industry (with the help and creativity of some labs) which often refers to the beauty of the Colombian faceted emerald using a questionable terminology to describe their color features.

Back to this Chivor specimen… Although the crystals exhibit a slight bluish tinge, they are far more saturated than the average saturation of the Muzo crystals.
San Gregorio is known for producing relatively small but highly saturated crystals.
Lustrous dolomite, pyrite, on a crumbly grey shale.



IMG_4890nb.JPG
 Mineral: Beryl (variety emerald), Dolomite, Pyrite
 Locality:
Chivor mining district, San Gregorio Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 21x58x31mm, largest xl=13mm
 Description:
 Viewed:  50188 Time(s)

IMG_4890nb.JPG



IMG_5003nb.JPG
 Mineral: Beryl (variety emerald), Dolomite, Pyrite
 Locality:
Chivor mining district, San Gregorio Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 21x58x31mm, largest xl=13mm
 Description:
 Viewed:  50232 Time(s)

IMG_5003nb.JPG



IMG_4954nb.JPG
 Mineral: Beryl (variety emerald), Dolomite, Pyrite
 Locality:
Chivor mining district, San Gregorio Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 21x58x31mm, largest xl=13mm
 Description:
 Viewed:  50176 Time(s)

IMG_4954nb.JPG



IMG_4965nb.JPG
 Mineral: Beryl (variety emerald), Dolomite, Pyrite
 Locality:
Chivor mining district, San Gregorio Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 21x58x31mm, largest xl=13mm
 Description:
 Viewed:  50155 Time(s)

IMG_4965nb.JPG



IMG_4937nb.JPG
 Mineral: Beryl (variety emerald), Dolomite, Pyrite
 Locality:
Chivor mining district, San Gregorio Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 21x58x31mm, largest xl=13mm
 Description:
 Viewed:  50213 Time(s)

IMG_4937nb.JPG


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Fiebre Verde




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PostPosted: Aug 06, 2016 09:04    Post subject: Re: Collection of Fiebre Verde - Coscuez (#566)  

The beryl prism of this Coscuez specimen is partially coated with tiny calcite crystals.
Host rock is a coarse-grained black shale



IMG_5009nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
Coscuez mining district, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 59x20x60mm, xl=7x5mm
 Description:
 Viewed:  50101 Time(s)

IMG_5009nb.JPG



IMG_5026nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
Coscuez mining district, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 59x20x60mm, xl=7x5mm
 Description:
 Viewed:  50120 Time(s)

IMG_5026nb.JPG



IMG_5071nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
Coscuez mining district, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 59x20x60mm, xl=7x5mm
 Description:
 Viewed:  50104 Time(s)

IMG_5071nb.JPG



IMG_5143nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
Coscuez mining district, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 59x20x60mm, xl=7x5mm
 Description:
 Viewed:  50152 Time(s)

IMG_5143nb.JPG



IMG_5116nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
Coscuez mining district, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 59x20x60mm, xl=7x5mm
 Description:
 Viewed:  50162 Time(s)

IMG_5116nb.JPG



IMG_5135nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
Coscuez mining district, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 59x20x60mm, xl=7x5mm
 Description:
 Viewed:  50120 Time(s)

IMG_5135nb.JPG



IMG_8213nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
Coscuez mining district, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 59x20x60mm, xl=7x5mm
 Description:
 Viewed:  50155 Time(s)

IMG_8213nb.JPG


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Fiebre Verde




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PostPosted: Aug 07, 2016 13:07    Post subject: Re: Collection of Fiebre Verde - Calceteros (#485)  

Calceteros mine also known as “Calcetero” or “El Calcetero” is located almost halfway between the historic mining areas of Coscuez and Peñas Blancas.
The emerald deposits of Coscuez and Calceteros are situated in the lower cretaceous Paja rocks units formation whereas the Peñas Blancas deposits are hosted by the (younger) Rosa Blanca formation (also lower cretaceous).
Based on this geological formation criteria alone, it was decided to attach the Calceteros locality to the Coscuez district rather than to Peñas Blancas.

I only have a handful of specimens from Calceteros and they exhibit some common features.
E.g. Oxidized coarse-grained black shale, coarse-grained aggregates of albite, quartz.
Beryl crystals are grouped into aggregates of small (<1cm) light green prisms with either a yellowish or bluish tinge.
Terminations often exhibit pyramidal faces combined with the flat pinacoid face.
The secondary color here is clearly yellow.

It’s impossible to draw conclusions about patterns and characteristics of this not so well-known locality with just a handful of specimens.
These are just basic observations which need to be corroborated by additional evidence which would require many more samples from additional finds!



Calcetero.JPG
 Locality:
Coscuez mining district, Calceteros Mine, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia
 Description:
"El Calcetero" is located halfway between the historic mining areas of Coscuez and Peñas Blancas (From Yannick Branquet, 1999).
 Viewed:  50081 Time(s)

Calcetero.JPG



IMG_5152nb.JPG
 Mineral: Beryl (variety emerald), Albite (variety cleavelandite), Quartz, Calcite
 Locality:
Coscuez mining district, Calceteros Mine, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 96x75x33mm, xls up to 10mm
 Description:
 Viewed:  50021 Time(s)

IMG_5152nb.JPG



IMG_5163nb.JPG
 Mineral: Beryl (variety emerald), Albite (variety cleavelandite), Quartz, Calcite
 Locality:
Coscuez mining district, Calceteros Mine, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 96x75x33mm, xls up to 10mm
 Description:
 Viewed:  50067 Time(s)

IMG_5163nb.JPG


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Fiebre Verde




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PostPosted: Aug 10, 2016 06:54    Post subject: Re: Collection of Fiebre Verde - Chivor (#378)  

From a relatively recent find (2011) in the Chivor district.
Host rock is black shale.



IMG_5189nb.JPG
 Mineral: Beryl (variety emerald), Albite (variety cleavelandite), Pyrite
 Locality:
Chivor mining district, Palo Arañado Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 38x35x18mm, largest xl=20mm
 Description:
 Viewed:  49922 Time(s)

IMG_5189nb.JPG



IMG_5226nb.JPG
 Mineral: Beryl (variety emerald), Albite (variety cleavelandite), Pyrite
 Locality:
Chivor mining district, Palo Arañado Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 38x35x18mm, largest xl=20mm
 Description:
 Viewed:  49919 Time(s)

IMG_5226nb.JPG



IMG_5211nb.JPG
 Mineral: Beryl (variety emerald), Albite (variety cleavelandite), Pyrite
 Locality:
Chivor mining district, Palo Arañado Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 38x35x18mm, largest xl=20mm
 Description:
 Viewed:  49877 Time(s)

IMG_5211nb.JPG



IMG_5225nb.JPG
 Mineral: Beryl (variety emerald), Albite (variety cleavelandite), Pyrite
 Locality:
Chivor mining district, Palo Arañado Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 38x35x18mm, largest xl=20mm
 Description:
 Viewed:  49954 Time(s)

IMG_5225nb.JPG


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Philippe Durand




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PostPosted: Aug 10, 2016 14:17    Post subject: Re: Collection of Fiebre Verde  

striking combination
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Fiebre Verde




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PostPosted: Aug 11, 2016 07:02    Post subject: Re: Collection of Fiebre Verde  

Philippe Durand wrote:
striking combination


Thanks for your appreciation Philippe.

Faceted Colombian emeralds have been praised for so long for their quality but nothing surpasses the beauty of the matrix specimens they come from.
In Colombia, the combination of various minerals and host rocks along with the beryl crystal(s) often produces the effect you stated. And this is even more true with the Chivor specimens.

Gérard
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Jamison Brizendine




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PostPosted: Aug 11, 2016 09:21    Post subject: Re: Collection of Fiebre Verde  

This thread never ceases to amaze me!

I particularly like the specimen from the Calceteros Mine (IMG_5152nb.JPG) and the emerald in the calcite/quartz vein from Chivor (IMG_4149nb.JPG).

I also like the aragonite and calcite specimen from Chivor as well (IMG_4840nb.JPG). What a cool oddity...
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Tobi
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PostPosted: Aug 11, 2016 12:15    Post subject: Re: Collection of Fiebre Verde  

Philippe Durand wrote:
striking combination
I agree, that emerald/pyrite combination gets me every time :)
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Fiebre Verde




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PostPosted: Aug 12, 2016 05:07    Post subject: Re: Collection of Fiebre Verde  

Jamison Brizendine wrote:
This thread never ceases to amaze me!

I particularly like the specimen from the Calceteros Mine (IMG_5152nb.JPG) and the emerald in the calcite/quartz vein from Chivor (IMG_4149nb.JPG).

I also like the aragonite and calcite specimen from Chivor as well (IMG_4840nb.JPG). What a cool oddity...

Well spotted Jamison.
Collectors, dealers and mineral lovers at large are often (too often?) exposed to classic specimens which can indeed be spectacular.
But there are many, many oddities out there, you just need to find them.
They are generally overlooked by the local stakeholders (mine owners, miners, brokers, dealers...). This situation can only be reversed through an educational process.

Tobi wrote:
Philippe Durand wrote:
striking combination
I agree, that emerald/pyrite combination gets me every time :)

The emerald/crystallized pyrite combination is found virtually everywhere in the Colombian emerald districts (with the notable exception of Peñas Blancas where the weathering environment has altered the pyrite).
I find there are many more variations of this combination in the Chivor region than in any other Emerald district.
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