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Collection of Fiebre Verde
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Fiebre Verde




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PostPosted: Feb 02, 2019 10:27    Post subject: Re: Collection of Fiebre Verde - Chivor (#736)  

Bright beryl crystal set in a brecciated albitite matrix from Chivor.


IMG_1516nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Pyrite
 Locality:
Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 30x27x21mm, xl=5mm
 Description:
 Viewed:  4272 Time(s)

IMG_1516nb.JPG



IMG_1544nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Pyrite
 Locality:
Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 30x27x21mm, xl=5mm
 Description:
 Viewed:  4271 Time(s)

IMG_1544nb.JPG


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Fiebre Verde




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PostPosted: Mar 05, 2019 16:56    Post subject: Re: Collection of Fiebre Verde - Chivor (#735)  

Semi-transparent Chivor crystals, most probably from Palo Arañado mine.
Host rock is black shale.



IMG_1440nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Pyrite
 Locality:
Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 77x24x45mm, longest xl=7mm
 Description:
 Viewed:  4114 Time(s)

IMG_1440nb.JPG



IMG_1488nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Pyrite
 Locality:
Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 77x24x45mm, longest xl=7mm
 Description:
 Viewed:  4125 Time(s)

IMG_1488nb.JPG


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Tobi




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PostPosted: Mar 06, 2019 02:48    Post subject: Re: Collection of Fiebre Verde - Chivor (#735)  

Fiebre Verde wrote:
Semi-transparent Chivor crystals, most probably from Palo Arañado mine. Host rock is black shale.
A stunning and highly beautiful contrast of black, white and vivid green, I like it :-)
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Fiebre Verde




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PostPosted: Mar 06, 2019 07:51    Post subject: Re: Collection of Fiebre Verde - Chivor (#735)  

Tobi wrote:
Fiebre Verde wrote:
Semi-transparent Chivor crystals, most probably from Palo Arañado mine. Host rock is black shale.
A stunning and highly beautiful contrast of black, white and vivid green, I like it :-)

Thanks for your nice comment Tobi.
This is a good example of the typical bluish-green hue found in some of the Chivor crystals.
This color is rarely seen in the crystals from the Western Belt (Muzo, Coscuez, La Pita, Peñas Blancas).
This also explains why the Chivor faceted stones are less sought-after than the Muzo/Coscuez/La Pita ones which have generally a much higher green saturation.
Useless to say that these are just general trends and there are many exceptions to this 'color rule' in both belts.
Gérard
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Fiebre Verde




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PostPosted: Mar 16, 2019 09:22    Post subject: Re: Collection of Fiebre Verde - Calcite (#8750)  

Aurangabad Calcite


IMG_1634nb.JPG
 Mineral: Calcite
 Locality:
Aurangabad District, Maharashtra, India
 Dimensions: 44x46x46mm
 Description:
 Viewed:  3878 Time(s)

IMG_1634nb.JPG


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Fiebre Verde




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PostPosted: Mar 20, 2019 16:13    Post subject: Re: Collection of Fiebre Verde - Coscuez (#737)  

Aggregate from Coscuez with a complex termination.


IMG_1589nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
Coscuez mining district, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 27x21x20mm
 Description:
 Viewed:  3781 Time(s)

IMG_1589nb.JPG


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Fiebre Verde




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PostPosted: May 16, 2019 14:25    Post subject: Re: Collection of Fiebre Verde - Chivor (#726)  

Cubic pyrite, calcite, 20+ emerald aggregates in parallel growth, set on a druse of sparkling white granular albite.
Host rock is an albitite rock i.e. a whitish albitized black shale matrix.
From a recent find (May 2018).



IMG_0294nb.JPG
 Mineral: Beryl (variety emerald), Pyrite, Calcite, Albite (variety cleavelandite)
 Locality:
Chivor Mining District, Camoyo Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 70x62x11mm, xls up to 8mm long
 Description:
 Viewed:  3402 Time(s)

IMG_0294nb.JPG



IMG_0317nb.JPG
 Mineral: Beryl (variety emerald), Pyrite, Calcite, Albite (variety cleavelandite)
 Locality:
Chivor Mining District, Camoyo Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 70x62x11mm, xls up to 8mm long
 Description:
 Viewed:  3407 Time(s)

IMG_0317nb.JPG



IMG_0360nb.JPG
 Mineral: Beryl (variety emerald), Pyrite, Calcite, Albite (variety cleavelandite)
 Locality:
Chivor Mining District, Camoyo Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 70x62x11mm, xls up to 8mm long
 Description:
 Viewed:  3386 Time(s)

IMG_0360nb.JPG


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Fiebre Verde




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PostPosted: Jun 29, 2019 16:19    Post subject: Re: Collection of Fiebre Verde - Muzo (#753)  

A Muzo specimen from an old collection.
Druse of vivid light-green crystals of a few mm long crisscrossing the shale matrix - very unusual formation.



IMG_1650nb.JPG
 Mineral: Beryl (variety emerald), Pyrite
 Locality:
Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 130x112x90mm
 Description:
 Viewed:  3092 Time(s)

IMG_1650nb.JPG



IMG_1663nb.JPG
 Mineral: Beryl (variety emerald), Pyrite
 Locality:
Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 130x112x90mm
 Description:
 Viewed:  3086 Time(s)

IMG_1663nb.JPG


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jose luis jara jara




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PostPosted: Jun 29, 2019 16:29    Post subject: Re: Collection of Fiebre Verde  

It is a piece with tiny crystals but bullies, I would not mind having a piece so small.
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Fiebre Verde




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PostPosted: Jun 29, 2019 16:57    Post subject: Re: Collection of Fiebre Verde  

jose luis jara jara wrote:
It is a piece with tiny crystals but bullies

Thank you Jose Luis - I am assuming "bullies" is the English translation for "muy bueno".
These crystals are indeed small but muy bueno - they are so bright!
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Fiebre Verde




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PostPosted: Aug 15, 2019 15:43    Post subject: Re: Collection of Fiebre Verde - Muzo (#744)  

Muzo specimen with cubic pyrite.
Black shale.



IMG_1690nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Pyrite
 Locality:
Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 64x44x56mm, xl=12x5mm
 Description:
 Viewed:  2685 Time(s)

IMG_1690nb.JPG


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Fiebre Verde




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PostPosted: Sep 08, 2019 08:21    Post subject: Re: Collection of Fiebre Verde - Coscuez (#745)  

Main beryl crystal is elongated hexagonal form.
Quartz and calcite set in a brecciated matrix with patches of black shale.



IMG_1717nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Quartz
 Locality:
Coscuez mining district, El Amarillal Mine, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 29 mm x 16 mm x 17 mm, main xl=8 mm x 10 mm
 Description:
Added a new Coscuez locality
 Viewed:  2408 Time(s)

IMG_1717nb.JPG


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Fiebre Verde




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PostPosted: Sep 22, 2019 13:44    Post subject: Re: Collection of Fiebre Verde - Coscuez (#747)  

Aggregate of 5 beryl crystals - some double terminated - embedded in a striated calcite matrix.


IMG_1763nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
Coscuez mining district, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 47mm x 38mm x 29mm, largest xl=19mm
 Description:
 Viewed:  2166 Time(s)

IMG_1763nb.JPG



IMG_1753nb.JPG
 Mineral: Beryl (variety emerald), Calcite
 Locality:
Coscuez mining district, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 47mm x 38mm x 29mm, largest xl=19mm
 Description:
 Viewed:  2171 Time(s)

IMG_1753nb.JPG


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Fiebre Verde




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PostPosted: Nov 16, 2019 12:34    Post subject: Re: Collection of Fiebre Verde - Chivor (#748)  

Lots of well formed crystals accompany this small beryl prism.
Host rock is grey shale.



IMG_1793nb.JPG
 Mineral: Beryl (variety emerald), Pyrite, Dolomite, Albite (variety cleavelandite)
 Locality:
Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 26mm x 31mm x 21mm, xl=2mm
 Description:
 Viewed:  1471 Time(s)

IMG_1793nb.JPG



IMG_1822nb.JPG
 Mineral: Beryl (variety emerald), Pyrite, Dolomite, Albite (variety cleavelandite)
 Locality:
Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 26mm x 31mm x 21mm, xl=2mm
 Description:
 Viewed:  1473 Time(s)

IMG_1822nb.JPG


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Fiebre Verde




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PostPosted: Nov 18, 2019 16:51    Post subject: Re: Collection of Fiebre Verde - Peñas Blancas (#746)  

A rare Fluorite-Emerald association, only found in the Western Emerald Belt.

Fluorites and emeralds occur in distinct formations in Peñas Blancas but there are a few exceptions to this rule.
The fluorite cube has cleaved corners and shows internal color zoning caused by the presence of trace-elements such as yttrium.

The other Western Belt locality where Fluorite can be found in association with Emerald is Muzo.

Got this specimen from my friend Bergur who visited the mine not long ago.



IMG_1865nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Fluorite
 Locality:
Peñas Blancas Mine, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 36mm x 17mm x 26mm, xl=6mm
 Description:
 Viewed:  1377 Time(s)

IMG_1865nb.JPG



IMG_1845nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Fluorite
 Locality:
Peñas Blancas Mine, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 36mm x 17mm x 26mm, xl=6mm
 Description:
 Viewed:  1377 Time(s)

IMG_1845nb.JPG


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Fiebre Verde




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PostPosted: Nov 23, 2019 10:57    Post subject: Re: Collection of Fiebre Verde - Chivor (#742)  

Aggregate of emerald crystals with a slight bluish cast.
Beryl crystals are standing on a druse of laminar albite.
Host rock is black shale.



IMG_1873nb.JPG
 Mineral: Beryl (variety emerald), Pyrite, Albite (variety cleavelandite)
 Locality:
Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 35mm x 25mm x 19mm, main xl=16mm
 Description:
 Viewed:  1279 Time(s)

IMG_1873nb.JPG



IMG_1897nb.JPG
 Mineral: Beryl (variety emerald), Pyrite, Albite (variety cleavelandite)
 Locality:
Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 35mm x 25mm x 19mm, main xl=16mm
 Description:
 Viewed:  1279 Time(s)

IMG_1897nb.JPG



IMG_1889nb.JPG
 Mineral: Beryl (variety emerald), Pyrite, Albite (variety cleavelandite)
 Locality:
Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 35mm x 25mm x 19mm, main xl=16mm
 Description:
 Viewed:  1282 Time(s)

IMG_1889nb.JPG


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Philippe Durand




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PostPosted: Dec 02, 2019 14:30    Post subject: Re: Collection of Fiebre Verde  

this is for you , of course


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Fiebre Verde




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PostPosted: Dec 02, 2019 20:45    Post subject: Re: Collection of Fiebre Verde  

Philippe Durand wrote:
this is for you , of course


Thanks for posting this link Philippe!
I had the privilege to see the exhibition and I must say that the organizer has accomplished an extraordinary tour de force in assembling so many iconic specimens from all over the world.
The exhibition also features lesser-known but equally fascinating specimens - the 3 prisms from Jos Plateau, Nigeria are breathtaking pieces! Can't recall the number of times I walked by the case #14 [13:40 in the video] at the risk of drawing the security guard's attention.
The one reservation I might have is that Colombian emeralds are not just about size and intrinsic beauty, which is the main focus of this exhibition, but it’s also about the wide diversity of the associated minerals.
Gerard
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Philippe Durand




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PostPosted: Dec 03, 2019 14:25    Post subject: Re: Collection of Fiebre Verde  

Indees, you were lucky Gerard:)
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Fiebre Verde




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PostPosted: Dec 19, 2019 14:05    Post subject: Re: Collection of Fiebre Verde - Chivor with pink Fluorapatite (#752)  

Colombian emerald matrix specimens are also known for their variety of mineral associations (not even mentioning the long list of solid mineral inclusions found in the Colombian emeralds).
Quartz, dolomite, calcite, pyrite, albite, aragonite, goethite are commonly found in association with emeralds.
Less commonly associated are parisite, fluorite, and muscovite (only in the Western Belt).
As for rutile and pink fluorapatite, they are rarely found in association with emeralds.

Never seen barite, sphalerite, allophane, euclase, siderite or vivianite in association with emeralds although these 6 minerals are relatively common in the Western Belt (also in the Eastern Belt for euclase).

Bergur, please shout if you have any comments or objections - I am sure you have plenty to add ;-)

. .



IMG_1901nb.JPG
 Mineral: Beryl (variety emerald), Pyrite, Calcite, Fluorapatite, Albite (variety cleavelandite)
 Locality:
Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 148mm x 87mm x 80mm, xl=15mm
 Description:
Three pink fluorapatite crystals can be seen on this specimen
 Viewed:  578 Time(s)

IMG_1901nb.JPG



IMG_1946nb.JPG
 Mineral: Beryl (variety emerald), Pyrite, Calcite, Fluorapatite, Albite (variety cleavelandite)
 Locality:
Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 148mm x 87mm x 80mm, xl=15mm
 Description:
Two pink fluorapatite crystals can be seen on this closeup
 Viewed:  576 Time(s)

IMG_1946nb.JPG



IMG_1972nb.JPG
 Mineral: Beryl (variety emerald), Pyrite, Calcite, Fluorapatite, Albite (variety cleavelandite)
 Locality:
Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 148mm x 87mm x 80mm, xl=15mm
 Description:
I am totally clueless as what are these lustrous brown crystals next to the white albite
 Viewed:  579 Time(s)

IMG_1972nb.JPG


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