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Collection of Fiebre Verde
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Romain M




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PostPosted: Jan 07, 2023 15:24    Post subject: Re: Collection of Fiebre Verde  

In this last picture, we can see the depth of the color even more I would say. Close to the c axis direction. Perfect catch of the holes, this one was in progress for being "un vaso" ;)
We can even better "feel" this almost wet-like luster in this second picture.

I was not expecting such a thin matrix from the first picture. They did a good job preserving the specimen during the extraction, almost a miracle!
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Fiebre Verde




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PostPosted: Jan 07, 2023 15:57    Post subject: Re: Collection of Fiebre Verde  

Romain M wrote:
In this last picture, we can see the depth of the color even more I would say. Close to the c axis direction. Perfect catch of the holes, this one was in progress for being "un vaso" ;)
We can even better "feel" this almost wet-like luster in this second picture.

I was not expecting such a thin matrix from the first picture. They did a good job preserving the specimen during the extraction, almost a miracle!

Right, it is a true miracle that the specimen survived considering the flat-shaped matrix and the fragile nature of a piece of rock that has been submitted to tremendous pressure.
The beryl crystals are damage-free, which is another miracle.
Considering the above, the last but not the least miracle was the miraculously reasonable price tag.
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Bergur_E_Sigurdarson




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PostPosted: Jan 07, 2023 17:42    Post subject: Re: Collection of Fiebre Verde  

I agree that with the form of the crystals that they are highly likely to be from Chivor (given my limited knowledge) I do also wonder if the micro crystals present aren't only calcite, but also micro albites... which as far as I've learned would also fit nicely.

On my monitor the emeralds do have the sufficient blueish green hue... but that is of course subject to image capture and processing.

As for miracles, given how Colombians tend to use explosives in their mines, it is indeed a miracle every time a good specimen comes out... and also... given how they handle their pieces after extraction, another miracle, as so often they are nowhere nearly as careful as they should be in making sure that no damage occurs (a problem I'm sure exists in other parts of the world, but continually irks me here in Colombia)

I have a few pieces I also suspect to be from the Chivor area that have a strangely "hollow" structure, and also around pyrite, so this would make your nice piece fit along with that too.

...and finally... Colombians either tend to extremely overvalue their pieces or undervalue... and even though emerald pieces are often over my budget, I often struggle with them showing me pieces that are of a very agreeable price when emerald is present and way too high when it's just quartz, calcite etc.
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Fiebre Verde




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PostPosted: Jan 08, 2023 08:52    Post subject: Re: Collection of Fiebre Verde  

Bergur_E_Sigurdarson wrote:
I agree that with the form of the crystals that they are highly likely to be from Chivor (given my limited knowledge) I do also wonder if the micro crystals present aren't only calcite, but also micro albites... which as far as I've learned would also fit nicely.

On my monitor the emeralds do have the sufficient blueish green hue... but that is of course subject to image capture and processing.

As for miracles, given how Colombians tend to use explosives in their mines, it is indeed a miracle every time a good specimen comes out... and also... given how they handle their pieces after extraction, another miracle, as so often they are nowhere nearly as careful as they should be in making sure that no damage occurs (a problem I'm sure exists in other parts of the world, but continually irks me here in Colombia)

I have a few pieces I also suspect to be from the Chivor area that have a strangely "hollow" structure, and also around pyrite, so this would make your nice piece fit along with that too.

...and finally... Colombians either tend to extremely overvalue their pieces or undervalue... and even though emerald pieces are often over my budget, I often struggle with them showing me pieces that are of a very agreeable price when emerald is present and way too high when it's just quartz, calcite etc.


Thanks for the clarifications Bergur.

No blueish green hue can be observed when viewing the piece in person - this is very likely a side effect of the lighting / camera sensor / monitor (or/and). The vitreous micro crystals coating the host rock might be albite - difficult to tell for sure. What makes me think this specimen is more likely from Chivor is the presence of hollow crystals which are virtually unknown in the Western Emerald Belt.

How specimen owners value their products in Colombia is directly related to their purchasing power and their consumption pattern.
I know I’m stating the obvious, but as a buyer, you will likely get a much better deal from a person who doesn’t own a SUV and who doesn’t replace his/her smartphone every year.
If the vendor is actually a broker (very often the case in Colombia), it’s already too late.
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Fiebre Verde




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PostPosted: Jan 19, 2023 16:32    Post subject: Re: Collection of Fiebre Verde - Chivor (#860)  

Water-clear crystal surrounded by small white elongated prismatic crystals of gypsum.
Specimen is partly covered with orange to dark brown material (limonite/goethite pseudomorphs after pyrite).
Host rock is black shale.



IMG_6151ab.JPG
 Mineral: Beryl (variety emerald), Calcite, Pyrite, Goethite
 Locality:
Chivor Mining District, Camoyo Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 77 x 65 x 42 mm, xl=14 x 8 mm
 Description:
 Viewed:  402 Time(s)

IMG_6151ab.JPG



IMG_6226ab.JPG
 Mineral: Beryl (variety emerald), Calcite, Pyrite, Goethite
 Locality:
Chivor Mining District, Camoyo Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 77 x 65 x 42 mm, xl=14 x 8 mm
 Description:
 Viewed:  400 Time(s)

IMG_6226ab.JPG



IMG_6153ab.JPG
 Mineral: Beryl (variety emerald), Calcite, Pyrite, Goethite
 Locality:
Chivor Mining District, Camoyo Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 77 x 65 x 42 mm, xl=14 x 8 mm
 Description:
 Viewed:  396 Time(s)

IMG_6153ab.JPG



IMG_6257ab.JPG
 Mineral: Beryl (variety emerald), Calcite, Pyrite, Goethite
 Locality:
Chivor Mining District, Camoyo Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 77 x 65 x 42 mm, xl=14 x 8 mm
 Description:
 Viewed:  399 Time(s)

IMG_6257ab.JPG


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Fiebre Verde




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PostPosted: Jan 24, 2023 07:50    Post subject: Re: Collection of Fiebre Verde - Coscuez (#857)  

Coscuez crystal with a spectacular "jardin" magnified by the transparency of the thin hexagonal prism.
Host rock is black shale.



IMG_6343a.JPG
 Mineral: Beryl (variety emerald), Calcite, Pyrite
 Locality:
Coscuez mining district, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 33 x 16 x 29 mm, xl=3.5 (H) x 7.5 mm (Diam)
 Description:
 Viewed:  250 Time(s)

IMG_6343a.JPG



IMG_6289a.JPG
 Mineral: Beryl (variety emerald), Calcite, Pyrite
 Locality:
Coscuez mining district, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 33 x 16 x 29 mm, xl=3.5 (H) x 7.5 mm (Diam)
 Description:
 Viewed:  251 Time(s)

IMG_6289a.JPG


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Romain M




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PostPosted: Jan 24, 2023 08:02    Post subject: Re: Collection of Fiebre Verde  

What an unusual one! We don't see that many tabular crystals of emeralds. We can almost feel the glow it generates with these swirls and inclusions.
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