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Collection of Fiebre Verde
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Fiebre Verde




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PostPosted: Jan 14, 2016 06:57    Post subject: Re: Collection of Fiebre Verde - Chivor (#404)  

Another glowing crystal, just for Tobi :-)
Host rock is black shale.



IMG_0791nb.JPG
 Mineral: Beryl (variety emerald), Albite (variety cleavelandite), Pyrite
 Locality:
Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 43x35x41mm, xl=10mm
 Description:
 Viewed:  10948 Time(s)

IMG_0791nb.JPG



IMG_0802nb.JPG
 Mineral: Beryl (variety emerald), Albite (variety cleavelandite), Pyrite
 Locality:
Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 43x35x41mm, xl=10mm
 Description:
 Viewed:  10941 Time(s)

IMG_0802nb.JPG



IMG_0815nb.JPG
 Mineral: Beryl (variety emerald), Albite (variety cleavelandite), Pyrite
 Locality:
Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 43x35x41mm, xl=10mm
 Description:
 Viewed:  10951 Time(s)

IMG_0815nb.JPG


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Fiebre Verde




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PostPosted: Jan 15, 2016 09:27    Post subject: Re: Collection of Fiebre Verde - Chivor (#450)  

This specimen is from a relatively recent find (2010/11) from the El Acuario mine, in the Eastern Belt.
The gray shale host rock is coated by a layer of pyrite nodules.
Another characteristic of this pocket is the pencil-shaped emerald crystals.
They are usually short (less than a centimeter) and contain very few inclusions.



IMG_0903nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Pyrite
 Locality:
Chivor mining district, El Acuario Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 92x41x52mm, main xl=4mm
 Description:
 Viewed:  10853 Time(s)

IMG_0903nb.JPG



IMG_0910nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Pyrite
 Locality:
Chivor mining district, El Acuario Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 92x41x52mm, main xl=4mm
 Description:
 Viewed:  10876 Time(s)

IMG_0910nb.JPG



IMG_0961nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Pyrite
 Locality:
Chivor mining district, El Acuario Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 92x41x52mm, main xl=4mm
 Description:
 Viewed:  10886 Time(s)

IMG_0961nb.JPG



IMG_0950nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Pyrite
 Locality:
Chivor mining district, El Acuario Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 92x41x52mm, main xl=4mm
 Description:
 Viewed:  10865 Time(s)

IMG_0950nb.JPG



IMG_0965nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Pyrite
 Locality:
Chivor mining district, El Acuario Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 92x41x52mm, main xl=4mm
 Description:
 Viewed:  10858 Time(s)

IMG_0965nb.JPG



IMG_0985nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Pyrite
 Locality:
Chivor mining district, El Acuario Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 92x41x52mm, main xl=4mm
 Description:
 Viewed:  10900 Time(s)

IMG_0985nb.JPG


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crosstimber
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PostPosted: Jan 15, 2016 17:15    Post subject: Re: Collection of Fiebre Verde  

I love the complex terminations on this last specimen. Wonderful.

Michael
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Fiebre Verde




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PostPosted: Jan 16, 2016 17:40    Post subject: Re: Collection of Fiebre Verde  

crosstimber wrote:
I love the complex terminations on this last specimen. Wonderful.

Michael


Thanks for sharing your enthusiasm Michael!

Although they are less known than their Western counterpart, I find that the specimens of the Eastern belt have a much wider variety and range of shapes, terminations, colors and hues.

For faceted stones, the production of the Chivor district accounts for less than 10% of the total Colombian production. If we assume the ratio is similar for the specimens that reach the market, this does not give lot of opportunities to appreciate and value the incredible diversity of the Chivor specimens.

Gérard
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Fiebre Verde




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PostPosted: Jan 17, 2016 14:27    Post subject: Re: Collection of Fiebre Verde - La Pita (#167)  

Back to the Western belt with a Polveros specimen.
Polveros is the southernmost locality of the La Pita mining district.
Emeralds from this locality tend to be less saturated than in Cunas or La Pita (La Pita name refers to a locality and a district - a bit confusing!).
White and semi-transparent striated calcite on black shale.



IMG_1218nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
La Pita mining district, Polveros Mine, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 41x52x59mm, xl=26x9mm
 Description:
 Viewed:  10693 Time(s)

IMG_1218nb.JPG



IMG_1091nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
La Pita mining district, Polveros Mine, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 41x52x59mm, xl=26x9mm
 Description:
 Viewed:  10694 Time(s)

IMG_1091nb.JPG



IMG_1144nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
La Pita mining district, Polveros Mine, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 41x52x59mm, xl=26x9mm
 Description:
 Viewed:  10698 Time(s)

IMG_1144nb.JPG


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Tobi




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PostPosted: Jan 18, 2016 03:41    Post subject: Re: Collection of Fiebre Verde  

That clear crystal on IMG_0985nb.JPG ( http://www.mineral-forum.com/message-board/download.php?id=63661 ) with its great terminations, so beautiful!
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Fiebre Verde




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PostPosted: Jan 18, 2016 10:30    Post subject: Re: Collection of Fiebre Verde  

Tobi wrote:
That clear crystal on IMG_0985nb.JPG ( http://www.mineral-forum.com/message-board/download.php?id=63661 ) with its great terminations, so beautiful!


Tobi, believe it or not but lot of crystals I have seen coming from that pocket have similar shapes and terminations! They are usually clean and not very saturated.
This was a real bonanza pocket but very few specimens reached the market.
Not sure if that mine is still in production - most of the mines of the Eastern belt are still in the hands of small owners and unless you visit the mines often and talk to the people, it's very difficult to find out what's their current production status.
Gérard
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PostPosted: Jan 19, 2016 16:22    Post subject: Re: Collection of Fiebre Verde - Peñas Blancas (#204)  

When it comes to minerals, Colombia is mostly known for Beryl, Euclase and, to a lesser extent, Parisite.
But this does not do justice to the Colombian quartz.
Peñas Blancas is known for producing emeralds but also for its beautiful clear colorless quartz.

This specimen features a quartz cluster with some very clear crystals.
The emerald is nested right in the center of the cluster and has the typical Peñas Blancas velvety appearance.
Color is very slightly bluish green.



IMG_1275nb.JPG
 Mineral: Beryl (variety emerald), Quartz
 Locality:
Peñas Blancas Mine, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 40mm across, xl=7mm
 Description:
 Viewed:  10493 Time(s)

IMG_1275nb.JPG



IMG_1476nb.JPG
 Mineral: Beryl (variety emerald), Quartz
 Locality:
Peñas Blancas Mine, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 40mm across, xl=7mm
 Description:
 Viewed:  10513 Time(s)

IMG_1476nb.JPG



IMG_1413nb.JPG
 Mineral: Beryl (variety emerald), Quartz
 Locality:
Peñas Blancas Mine, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 40mm across, xl=7mm
 Description:
 Viewed:  10485 Time(s)

IMG_1413nb.JPG



IMG_1337nb.JPG
 Mineral: Beryl (variety emerald), Quartz
 Locality:
Peñas Blancas Mine, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 40mm across, xl=7mm
 Description:
 Viewed:  10493 Time(s)

IMG_1337nb.JPG


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Fiebre Verde




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PostPosted: Jan 22, 2016 07:18    Post subject: Re: Collection of Fiebre Verde - Muzo (#9)  

Although less spectacular than in Peñas Blancas, water clear quartz can be also found in Muzo.
The tip of the (only) quartz crystal of this specimen is party visible at the bottom-center of #1643.
Host rock is black shale.



IMG_1519nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Pyrite, Quartz
 Locality:
Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 56x46x34mm, xl=13mm
 Description:
 Viewed:  10328 Time(s)

IMG_1519nb.JPG



IMG_1535nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Pyrite, Quartz
 Locality:
Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 56x46x34mm, xl=13mm
 Description:
 Viewed:  10359 Time(s)

IMG_1535nb.JPG



IMG_1643nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Pyrite, Quartz
 Locality:
Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 56x46x34mm, xl=13mm
 Description:
 Viewed:  10333 Time(s)

IMG_1643nb.JPG



IMG_1627nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Pyrite, Quartz
 Locality:
Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 56x46x34mm, xl=13mm
 Description:
 Viewed:  10337 Time(s)

IMG_1627nb.JPG



IMG_1651nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Pyrite, Quartz
 Locality:
Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 56x46x34mm, xl=13mm
 Description:
 Viewed:  10348 Time(s)

IMG_1651nb.JPG


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Fiebre Verde




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PostPosted: Jan 23, 2016 11:00    Post subject: Re: Collection of Fiebre Verde - La Pita/Polveros (#268)  

Too good to be true, highly suspicious position of the beryl crystal with respect to the matrix, and so on....
Of course, this came immediately to my mind when I first saw this specimen.
At that time (2009) a new pocket had just been found in Polveros.
Unfortunately the emeralds were far from being clean and were lacking color.
But the quality of the calcite crystals was good enough to justify some "art work" by the local craftsmen.
The way the beryl prism is contacted in several points at its base rules out any fakery.

Host rock is black shale.



IMG_1702nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
La Pita mining district, Polveros Mine, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 45x32x28mm, xl=18x7mm
 Description:
 Viewed:  10229 Time(s)

IMG_1702nb.JPG



IMG_1731nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
La Pita mining district, Polveros Mine, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 45x32x28mm, xl=18x7mm
 Description:
 Viewed:  10271 Time(s)

IMG_1731nb.JPG



IMG_1792nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
La Pita mining district, Polveros Mine, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 45x32x28mm, xl=18x7mm
 Description:
 Viewed:  10246 Time(s)

IMG_1792nb.JPG


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Fiebre Verde




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PostPosted: Jan 24, 2016 13:20    Post subject: Re: Collection of Fiebre Verde - Muzo (#189)  

Emerald aggregate from Muzo.
Host rock is black shale.



IMG_2064nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 58x31x34mm, crystal aggregate=25x8mm
 Description:
 Viewed:  10184 Time(s)

IMG_2064nb.JPG



IMG_1903nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 58x31x34mm, xl aggregate=25x8mm
 Description:
 Viewed:  10222 Time(s)

IMG_1903nb.JPG



IMG_1913nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 58x31x34mm, xl aggregate=25x8mm
 Description:
 Viewed:  10162 Time(s)

IMG_1913nb.JPG



IMG_2031nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 58x31x34mm, xl aggregate=25x8mm
 Description:
 Viewed:  10195 Time(s)

IMG_2031nb.JPG



IMG_1940nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 58x31x34mm, xl aggregate=25x8mm
 Description:
 Viewed:  10184 Time(s)

IMG_1940nb.JPG



IMG_1983nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 58x31x34mm, xl aggregate=25x8mm
 Description:
 Viewed:  10175 Time(s)

IMG_1983nb.JPG



IMG_1963nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 58x31x34mm, xl aggregate=25x8mm
 Description:
 Viewed:  10188 Time(s)

IMG_1963nb.JPG


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Fiebre Verde




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PostPosted: Jan 25, 2016 09:17    Post subject: Re: Collection of Fiebre Verde - La Pita (#220)  

From the La Pita district.
Host rock is black shale.



IMG_2300nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
La Pita mining district, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 35x38x37mm, main xl=12x4mm
 Description:
 Viewed:  10095 Time(s)

IMG_2300nb.JPG



IMG_2204nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
La Pita mining district, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 35x38x37mm, main xl=12x4mm
 Description:
 Viewed:  10117 Time(s)

IMG_2204nb.JPG



IMG_2153nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
La Pita mining district, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 35x38x37mm, main xl=12x4mm
 Description:
 Viewed:  10100 Time(s)

IMG_2153nb.JPG



IMG_2160nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Dimensions: 35x38x37mm, main xl=12x4mm
 Description:
 Viewed:  10109 Time(s)

IMG_2160nb.JPG



IMG_2172nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
La Pita mining district, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 35x38x37mm, main xl=12x4mm
 Description:
 Viewed:  10110 Time(s)

IMG_2172nb.JPG


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Fiebre Verde




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PostPosted: Jan 26, 2016 18:13    Post subject: Re: Collection of Fiebre Verde - Muzo (#54)  

This Muzo specimen baffles me.
Can't figure out what's the anthracite/graphite-like material coating the shale matrix (see last image for close-up).
I have never seen this crystal habit in Muzo or any nearby locality.
Could that simply be... black calcite?
In some areas, some white calcite is squeezed between the shale host rock and that mysterious black material.

The beryl crystal was broken into two parts and the fracture was filled with that material.
Although not equally developed, first and second order prisms are clearly visible.

Very interested to hear your suggestions and ideas!

Gérard



IMG_2317nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 62x27x39mm, original xl=25mm
 Description:
 Viewed:  10002 Time(s)

IMG_2317nb.JPG



IMG_2321nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 62x27x39mm, original xl=25mm
 Description:
 Viewed:  9974 Time(s)

IMG_2321nb.JPG



IMG_2329nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 62x27x39mm, original xl=25mm
 Description:
 Viewed:  9982 Time(s)

IMG_2329nb.JPG



IMG_2345nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 62x27x39mm, original xl=25mm
 Description:
 Viewed:  9984 Time(s)

IMG_2345nb.JPG



IMG_2379nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 62x27x39mm, original xl=25mm
 Description:
 Viewed:  9977 Time(s)

IMG_2379nb.JPG



IMG_2404nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 62x27x39mm, original xl=25mm
 Description:
 Viewed:  10013 Time(s)

IMG_2404nb.JPG



IMG_2458nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 62x27x39mm, original xl=25mm
 Description:
Any idea on what that could be?
 Viewed:  9992 Time(s)

IMG_2458nb.JPG


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Jordi Fabre
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PostPosted: Jan 26, 2016 23:51    Post subject: Re: Collection of Fiebre Verde - Muzo (#54)  

Fiebre Verde wrote:
...Can't figure out what's the anthracite/graphite-like material coating the shale matrix (see last image for close-up).
I have never seen this crystal habit in Muzo or any nearby locality.
Could that simply be... black calcite?...

Carbonaceous inclusions?
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Fiebre Verde




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PostPosted: Jan 27, 2016 07:43    Post subject: Re: Collection of Fiebre Verde  

Thanks Jordi.
Could also be the result of a graphitization process of carbonaceous material?
It does leave black marks on paper but so does carbonaceous black shale.
Not a big deal - will tag this as consolidated carbonaceous debris.
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Fiebre Verde




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PostPosted: Jan 27, 2016 12:22    Post subject: Re: Collection of Fiebre Verde - Cunas (#182)  

Dolomite crystal and emerald cluster over a white calcite rhomb.


IMG_2657nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Dolomite
 Locality:
La Pita mining district, Cunas Mine, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: rhomb size=30x30x30mm, longest xl=18mm
 Description:
 Viewed:  9875 Time(s)

IMG_2657nb.JPG



IMG_2608nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Dolomite
 Locality:
La Pita mining district, Cunas Mine, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: rhomb size=30x30x30mm, longest xl=18mm
 Description:
 Viewed:  9844 Time(s)

IMG_2608nb.JPG



IMG_2592nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Dolomite
 Locality:
La Pita mining district, Cunas Mine, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: rhomb size=30x30x30mm, longest xl=18mm
 Description:
 Viewed:  9878 Time(s)

IMG_2592nb.JPG



IMG_2572nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Dolomite
 Locality:
La Pita mining district, Cunas Mine, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: rhomb size=30x30x30mm, longest xl=18mm
 Description:
 Viewed:  9830 Time(s)

IMG_2572nb.JPG


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Fiebre Verde




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PostPosted: Jan 28, 2016 15:09    Post subject: Re: Collection of Fiebre Verde - Cunas (#30)  

Main crystal is double terminated.
Host rock is black shale.



IMG_2666nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Dolomite, Pyrite
 Locality:
La Pita mining district, Cunas Mine, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 28x33x28mm, main xls=18mm & 9mm
 Description:
 Viewed:  9747 Time(s)

IMG_2666nb.JPG



IMG_2743nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Dolomite, Pyrite
 Locality:
La Pita mining district, Cunas Mine, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 28x33x28mm, main xls=18mm & 9mm
 Description:
 Viewed:  9720 Time(s)

IMG_2743nb.JPG


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Fiebre Verde




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PostPosted: Jan 29, 2016 17:16    Post subject: Re: Collection of Fiebre Verde - Coscuez (#10)  

In September 2015, the UK-based mining company Gemfields has entered into binding agreements to acquire controlling interests in two emerald projects in Colombia, one of them being Coscuez. At completion, Gemfields will acquire an indirect 70% interest in a Colombian company which will hold the mining contract for the Coscuez mine.
It's still too early to measure the impact of this major takeover on the specimen production from this historical mine.



IMG_2790nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Dolomite
 Locality:
Coscuez mining district, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 40x43x40mm, xl=9mm
 Description:
 Viewed:  9633 Time(s)

IMG_2790nb.JPG



IMG_2820nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Dolomite
 Locality:
Coscuez mining district, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 40x43x40mm, xl=9mm
 Description:
 Viewed:  9637 Time(s)

IMG_2820nb.JPG



IMG_2832nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Dolomite
 Locality:
Coscuez mining district, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 40x43x40mm, xl=9mm
 Description:
 Viewed:  9636 Time(s)

IMG_2832nb.JPG



IMG_2885nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Dolomite
 Locality:
Coscuez mining district, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 40x43x40mm, xl=9mm
 Description:
 Viewed:  9632 Time(s)

IMG_2885nb.JPG



IMG_2811nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Dolomite
 Locality:
Coscuez mining district, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 40x43x40mm, xl=9mm
 Description:
 Viewed:  9635 Time(s)

IMG_2811nb.JPG


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Fiebre Verde




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PostPosted: Jan 30, 2016 13:11    Post subject: Re: Collection of Fiebre Verde - Hexagonal tabular pink apatite & emerald (#242)  

Not the most aesthetic specimen of my collection but probably the most exotic one.
I found this specimen in a European show, 7 years ago. The label mentions Peñas Blancas for the locality name but nothing is less sure.

Assuming it's not a fake (which is a reasonable assumption considering the poor quality of the apatite crystals and the way they are contacted by the emeralds from almost every side), here is the dilemma:
1) The only Colombian locality producing/having produced pink tabular apatite is La Marina mine which is located right in the heart of the Western Emerald Belt.
2) The Mindat mineral list for La Marina is limited to albite, euclase and apatite. Never heard of any emerald occurrence in La Marina, even from the most enthusiastic dealers in Bogota (I like to challenge them but that's another story...)

Of course, the other option is that it's not Colombian.
It is reported that pink apatite, beryl (variety emerald) and albite (variety cleavelandite) can be found in the Laghman pegmatite province in Afghanistan. But Laghman province is vast and these minerals do not necessarily coexist in the same locality. Not even mentioning that Laghman emeralds are known to be embedded in schist matrix.
So Laghman is a very remote possibility...

In the absence of further evidence, I will label this specimen as Colombian.

Matrix is highly oxidized albite.



IMG_2956nb.JPG
 Mineral: Beryl (variety emerald), Albite (variety cleavelandite), Calcite, Apatite
 Locality:
Colombia
 Dimensions: 37x18x33mm
 Description:
 Viewed:  9581 Time(s)

IMG_2956nb.JPG



IMG_3028nb.JPG
 Mineral: Beryl (variety emerald), Albite (variety cleavelandite), Calcite, Apatite
 Locality:
Colombia
 Dimensions: 37x18x33mm
 Description:
 Viewed:  9552 Time(s)

IMG_3028nb.JPG



IMG_2960nb.JPG
 Mineral: Beryl (variety emerald), Albite (variety cleavelandite), Calcite, Apatite
 Locality:
Colombia
 Dimensions: 37x18x33mm
 Description:
 Viewed:  9531 Time(s)

IMG_2960nb.JPG



IMG_3001nb.JPG
 Mineral: Beryl (variety emerald), Albite (variety cleavelandite), Calcite, Apatite
 Locality:
Colombia
 Dimensions: 37x18x33mm
 Description:
 Viewed:  9548 Time(s)

IMG_3001nb.JPG



IMG_2991nb.JPG
 Mineral: Beryl (variety emerald), Albite (variety cleavelandite), Calcite, Apatite
 Locality:
Colombia
 Dimensions: 37x18x33mm
 Description:
 Viewed:  9543 Time(s)

IMG_2991nb.JPG



IMG_3031nb.JPG
 Mineral: Beryl (variety emerald), Albite (variety cleavelandite), Calcite, Apatite
 Locality:
Colombia
 Dimensions: 37x18x33mm
 Description:
 Viewed:  9534 Time(s)

IMG_3031nb.JPG


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Josele




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PostPosted: Jan 30, 2016 14:27    Post subject: Re: Collection of Fiebre Verde  

Really an interesting piece!

A quick search in mindat gives more examples of Colombian emerald-apatite combinations:
http://www.mindat.org/photo-66089.html
http://www.mindat.org/photo-66130.html

If it is not Colombian, could be also from Pakistan.

Did you check the fluorescence?

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