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Fiebre Verde
Joined: 11 Sep 2013
Posts: 944
Location: Paris Area
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 Posted: Aug 15, 2019 15:43 Post subject: Re: Collection of Fiebre Verde - Muzo (#744) |
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Muzo specimen with cubic pyrite.
Black shale.
| Mineral: | Beryl (variety emerald), Calcite, Pyrite |
| Locality: | | Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia |  |
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| Dimensions: | 64x44x56mm, xl=12x5mm |
| Description: |
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| Viewed: |
97106 Time(s) |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 944
Location: Paris Area
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| Posted: Sep 08, 2019 08:21 Post subject: Re: Collection of Fiebre Verde - Coscuez (#745) |
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Main beryl crystal is elongated hexagonal form.
Quartz and calcite set in a brecciated matrix with patches of black shale.
| Mineral: | Beryl (variety emerald), Calcite, Quartz |
| Locality: | | Coscuez mining district, El Amarillal Mine, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 29 mm x 16 mm x 17 mm, main xl=8 mm x 10 mm |
| Description: |
| Added a new Coscuez locality |
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| Viewed: |
96853 Time(s) |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 944
Location: Paris Area
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| Posted: Sep 22, 2019 13:44 Post subject: Re: Collection of Fiebre Verde - Coscuez (#747) |
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Aggregate of 5 beryl crystals - some double terminated - embedded in a striated calcite matrix.
| Mineral: | Beryl (variety emerald), Calcite |
| Locality: | | Coscuez mining district, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 47mm x 38mm x 29mm, largest xl=19mm |
| Description: |
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| Viewed: |
96581 Time(s) |
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| Mineral: | Beryl (variety emerald), Calcite |
| Locality: | | Coscuez mining district, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 47mm x 38mm x 29mm, largest xl=19mm |
| Description: |
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| Viewed: |
96586 Time(s) |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 944
Location: Paris Area
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| Posted: Nov 16, 2019 12:34 Post subject: Re: Collection of Fiebre Verde - Chivor (#748) |
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Lots of well formed crystals accompany this small beryl prism.
Host rock is grey shale.
| Mineral: | Beryl (variety emerald), Pyrite, Dolomite, Albite (variety cleavelandite) |
| Locality: | | Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 26mm x 31mm x 21mm, xl=2mm |
| Description: |
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| Viewed: |
95895 Time(s) |
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| Mineral: | Beryl (variety emerald), Pyrite, Dolomite, Albite (variety cleavelandite) |
| Locality: | | Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 26mm x 31mm x 21mm, xl=2mm |
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| Viewed: |
95870 Time(s) |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 944
Location: Paris Area
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| Posted: Nov 18, 2019 16:51 Post subject: Re: Collection of Fiebre Verde - Peñas Blancas (#746) |
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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.
| Mineral: | Beryl (variety emerald), Calcite, Fluorite |
| Locality: | | Peñas Blancas Mine, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 36mm x 17mm x 26mm, xl=6mm |
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| Viewed: |
95736 Time(s) |
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| Mineral: | Beryl (variety emerald), Calcite, Fluorite |
| Locality: | | Peñas Blancas Mine, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 36mm x 17mm x 26mm, xl=6mm |
| Description: |
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| Viewed: |
95722 Time(s) |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 944
Location: Paris Area
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| Posted: Nov 23, 2019 10:57 Post subject: Re: Collection of Fiebre Verde - Chivor (#742) |
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Aggregate of emerald crystals with a slight bluish cast.
Beryl crystals are standing on a druse of laminar albite.
Host rock is black shale.
| Mineral: | Beryl (variety emerald), Pyrite, Albite (variety cleavelandite) |
| Locality: | | Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 35mm x 25mm x 19mm, main xl=16mm |
| Description: |
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| Viewed: |
95401 Time(s) |
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| Mineral: | Beryl (variety emerald), Pyrite, Albite (variety cleavelandite) |
| Locality: | | Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 35mm x 25mm x 19mm, main xl=16mm |
| Description: |
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| Viewed: |
95401 Time(s) |
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| Mineral: | Beryl (variety emerald), Pyrite, Albite (variety cleavelandite) |
| Locality: | | Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 35mm x 25mm x 19mm, main xl=16mm |
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| Viewed: |
95340 Time(s) |
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Philippe Durand
Joined: 10 May 2016
Posts: 653
Location: Normandie
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 944
Location: Paris Area
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| Posted: Dec 02, 2019 20:45 Post subject: Re: Collection of Fiebre Verde |
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| Philippe Durand wrote: | this is for you , of course
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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
Joined: 10 May 2016
Posts: 653
Location: Normandie
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 944
Location: Paris Area
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| Posted: Dec 19, 2019 14:05 Post subject: Re: Collection of Fiebre Verde - Chivor with pink Fluorapatite (#752) |
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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 ;-)
. .
| Mineral: | Beryl (variety emerald), Pyrite, Calcite, Fluorapatite, Albite (variety cleavelandite) |
| Locality: | | Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 148mm x 87mm x 80mm, xl=15mm |
| Description: |
| Three pink fluorapatite crystals can be seen on this specimen |
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| Viewed: |
94650 Time(s) |
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| Mineral: | Beryl (variety emerald), Pyrite, Calcite, Fluorapatite, Albite (variety cleavelandite) |
| Locality: | | Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 148mm x 87mm x 80mm, xl=15mm |
| Description: |
| Two pink fluorapatite crystals can be seen on this closeup |
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| Viewed: |
94668 Time(s) |
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| Mineral: | Beryl (variety emerald), Pyrite, Calcite, Fluorapatite, Albite (variety cleavelandite) |
| Locality: | | Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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| 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 |
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| Viewed: |
94671 Time(s) |
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Bergur_E_Sigurdarson
Joined: 21 Dec 2017
Posts: 148
Location: Paipa, Colombia
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| Posted: Dec 19, 2019 16:59 Post subject: Re: Collection of Fiebre Verde |
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A lot easier to give comments on specimens seen in person than of photos obviously.
I would venture a guess on the lustrous brown crystals to be grey dolomite, just with some iron staining and even micro-inclusions of ferrous types.
I have seen several times in the matrix from Chivor area that under UV glow some crystals in pink... I presume these to be fluorapatite, just that they are either faded or never got their pale pink colour.
It is excellent to see a sample that has nicely formed crystals of color next to the emerald crystals themselves :-)
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 944
Location: Paris Area
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| Posted: Dec 21, 2019 15:40 Post subject: Re: Collection of Fiebre Verde - Chivor (#766) |
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Here is an oddity from Chivor - a dome-like crystal which has been contacted from all sides.
The upper crystal (image 1994) is also showing multiple contact areas.
Host rock is black shale.
| Mineral: | Beryl (variety emerald), Pyrite, Calcite |
| Locality: | | Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 36mm x 45mm x 37mm, xls=13 & 5mm |
| Description: |
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| Viewed: |
93525 Time(s) |
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| Mineral: | Beryl (variety emerald), Pyrite, Calcite |
| Locality: | | Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 36mm x 45mm x 37mm, xls=13 & 5mm |
| Description: |
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| Viewed: |
93504 Time(s) |
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| Mineral: | Beryl (variety emerald), Pyrite, Calcite |
| Locality: | | Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 36mm x 45mm x 37mm, xls=13 & 5mm |
| Description: |
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| Viewed: |
93502 Time(s) |
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| Mineral: | Beryl (variety emerald), Pyrite, Calcite |
| Locality: | | Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 36mm x 45mm x 37mm, xls=13 & 5mm |
| Description: |
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| Viewed: |
93523 Time(s) |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 944
Location: Paris Area
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| Posted: Dec 25, 2019 16:51 Post subject: Re: Collection of Fiebre Verde - Polveros (#768) |
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Glowing translucent (striated) calcite matrix included with carbonaceous material.
Patches of black shale on the back.
| Mineral: | Beryl (variety emerald), Calcite |
| Locality: | | La Pita mining district, Polveros Mine, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 39mm x 32mm x 21mm, xl=12mm |
| Description: |
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| Viewed: |
93469 Time(s) |
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| Mineral: | Beryl (variety emerald), Calcite |
| Locality: | | La Pita mining district, Polveros Mine, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 39mm x 32mm x 21mm, xl=12mm |
| Description: |
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| Viewed: |
93449 Time(s) |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 944
Location: Paris Area
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| Posted: Dec 26, 2019 17:53 Post subject: Re: Collection of Fiebre Verde - Muzo (#8825) |
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Not everything is green in Muzo.
| Locality: | | Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia | |
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| Description: |
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| Viewed: |
93367 Time(s) |
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| Mineral: | Quartz, Pyrite |
| Locality: | | Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 72mm x 72mm x 46mm |
| Description: |
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| Viewed: |
93394 Time(s) |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 944
Location: Paris Area
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| Posted: Dec 27, 2019 14:44 Post subject: Re: Collection of Fiebre Verde - Coscuez (#769) |
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Catching up on my backlog of photos...
Here is a nice little specimen from Coscuez.
| Mineral: | Beryl (variety emerald), Dolomite |
| Locality: | | Coscuez mining district, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 14mm x 15mm x 15mm, xl=15mm |
| Description: |
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| Viewed: |
93335 Time(s) |
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