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silvia
Joined: 10 Oct 2021
Posts: 253
Location: UK
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 Posted: Jul 25, 2022 16:45 Post subject: Re: Collection of Fiebre Verde |
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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
Joined: 11 Sep 2013
Posts: 944
Location: Paris Area
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| Posted: Jul 25, 2022 16:58 Post subject: Re: Collection of Fiebre Verde |
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| 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
Joined: 11 Sep 2013
Posts: 944
Location: Paris Area
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| Posted: Jan 07, 2023 09:04 Post subject: Re: Collection of Fiebre Verde - Chivor (#861) |
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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.
| Mineral: | Beryl (variety emerald), Calcite, Pyrite |
| Locality: | | Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia |  |
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| Dimensions: | 68 x 50 x 14 mm - main xl fragment 21 mm |
| Description: |
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38978 Time(s) |
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Romain M
Joined: 02 Nov 2021
Posts: 11
Location: Avignon
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| Posted: Jan 07, 2023 09:53 Post subject: Re: Collection of Fiebre Verde |
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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
Joined: 11 Sep 2013
Posts: 944
Location: Paris Area
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| Posted: Jan 07, 2023 12:25 Post subject: Re: Collection of Fiebre Verde |
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| 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
| Mineral: | Beryl (variety emerald), Calcite, Pyrite |
| Locality: | | Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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| 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. |
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38963 Time(s) |
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Romain M
Joined: 02 Nov 2021
Posts: 11
Location: Avignon
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| Posted: Jan 07, 2023 15:24 Post subject: Re: Collection of Fiebre Verde |
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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
Joined: 11 Sep 2013
Posts: 944
Location: Paris Area
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| Posted: Jan 07, 2023 15:57 Post subject: Re: Collection of Fiebre Verde |
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| 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
Joined: 21 Dec 2017
Posts: 148
Location: Paipa, Colombia
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| Posted: Jan 07, 2023 17:42 Post subject: Re: Collection of Fiebre Verde |
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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
Joined: 11 Sep 2013
Posts: 944
Location: Paris Area
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| Posted: Jan 08, 2023 08:52 Post subject: Re: Collection of Fiebre Verde |
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| 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
Joined: 11 Sep 2013
Posts: 944
Location: Paris Area
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| Posted: Jan 19, 2023 16:32 Post subject: Re: Collection of Fiebre Verde - Chivor (#860) |
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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.
| Mineral: | Beryl (variety emerald), Calcite, Pyrite, Goethite |
| Locality: | | Chivor Mining District, Camoyo Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 77 x 65 x 42 mm, xl=14 x 8 mm |
| Description: |
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| Viewed: |
35269 Time(s) |
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| Mineral: | Beryl (variety emerald), Calcite, Pyrite, Goethite |
| Locality: | | Chivor Mining District, Camoyo Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 77 x 65 x 42 mm, xl=14 x 8 mm |
| Description: |
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| Viewed: |
35284 Time(s) |
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| Mineral: | Beryl (variety emerald), Calcite, Pyrite, Goethite |
| Locality: | | Chivor Mining District, Camoyo Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 77 x 65 x 42 mm, xl=14 x 8 mm |
| Description: |
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| Viewed: |
35280 Time(s) |
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| Mineral: | Beryl (variety emerald), Calcite, Pyrite, Goethite |
| Locality: | | Chivor Mining District, Camoyo Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 77 x 65 x 42 mm, xl=14 x 8 mm |
| Description: |
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| Viewed: |
35237 Time(s) |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 944
Location: Paris Area
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| Posted: Jan 24, 2023 07:50 Post subject: Re: Collection of Fiebre Verde - Coscuez (#857) |
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Coscuez crystal with a spectacular "jardin" magnified by the transparency of the thin hexagonal prism.
Host rock is black shale.
| Mineral: | Beryl (variety emerald), Calcite, Pyrite |
| Locality: | | Coscuez mining district, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 33 x 16 x 29 mm, xl=3.5 (H) x 7.5 mm (Diam) |
| Description: |
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| Viewed: |
35118 Time(s) |
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| Mineral: | Beryl (variety emerald), Calcite, Pyrite |
| Locality: | | Coscuez mining district, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 33 x 16 x 29 mm, xl=3.5 (H) x 7.5 mm (Diam) |
| Description: |
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| Viewed: |
35132 Time(s) |
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Romain M
Joined: 02 Nov 2021
Posts: 11
Location: Avignon
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| Posted: Jan 24, 2023 08:02 Post subject: Re: Collection of Fiebre Verde |
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| 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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