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Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
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Posted: Feb 02, 2019 10:27 Post subject: Re: Collection of Fiebre Verde - Chivor (#736) |
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Bright beryl crystal set in a brecciated albitite matrix from Chivor.
Mineral: | Beryl (variety emerald), Calcite, Pyrite |
Locality: | Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | 30x27x21mm, xl=5mm |
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25374 Time(s) |
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Mineral: | Beryl (variety emerald), Calcite, Pyrite |
Locality: | Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | 30x27x21mm, xl=5mm |
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25353 Time(s) |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
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Posted: Mar 05, 2019 16:56 Post subject: Re: Collection of Fiebre Verde - Chivor (#735) |
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Semi-transparent Chivor crystals, most probably from Palo Arañado mine.
Host rock is 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: | 77x24x45mm, longest xl=7mm |
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25195 Time(s) |
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Mineral: | Beryl (variety emerald), Calcite, Pyrite |
Locality: | Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | 77x24x45mm, longest xl=7mm |
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25220 Time(s) |
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Tobi
Site Admin
Joined: 07 Apr 2009
Posts: 4112
Location: Germany
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Posted: Mar 06, 2019 02:48 Post subject: Re: Collection of Fiebre Verde - Chivor (#735) |
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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
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
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Posted: Mar 06, 2019 07:51 Post subject: Re: Collection of Fiebre Verde - Chivor (#735) |
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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
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
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Posted: Mar 16, 2019 09:22 Post subject: Re: Collection of Fiebre Verde - Calcite (#8750) |
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Aurangabad Calcite
Mineral: | Calcite |
Locality: | Aurangabad District, Maharashtra, India | |
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Dimensions: | 44x46x46mm |
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24957 Time(s) |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
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Posted: Mar 20, 2019 16:13 Post subject: Re: Collection of Fiebre Verde - Coscuez (#737) |
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Aggregate from Coscuez with a complex termination.
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: | 27x21x20mm |
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24868 Time(s) |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
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Posted: May 16, 2019 14:25 Post subject: Re: Collection of Fiebre Verde - Chivor (#726) |
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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).
Mineral: | Beryl (variety emerald), Pyrite, Calcite, Albite (variety cleavelandite) |
Locality: | Chivor Mining District, Camoyo Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | 70x62x11mm, xls up to 8mm long |
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24471 Time(s) |
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Mineral: | Beryl (variety emerald), Pyrite, Calcite, Albite (variety cleavelandite) |
Locality: | Chivor Mining District, Camoyo Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | 70x62x11mm, xls up to 8mm long |
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24508 Time(s) |
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Mineral: | Beryl (variety emerald), Pyrite, Calcite, Albite (variety cleavelandite) |
Locality: | Chivor Mining District, Camoyo Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | 70x62x11mm, xls up to 8mm long |
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24452 Time(s) |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
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Posted: Jun 29, 2019 16:19 Post subject: Re: Collection of Fiebre Verde - Muzo (#753) |
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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.
Mineral: | Beryl (variety emerald), Pyrite |
Locality: | Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | 130x112x90mm |
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24157 Time(s) |
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Mineral: | Beryl (variety emerald), Pyrite |
Locality: | Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | 130x112x90mm |
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24163 Time(s) |
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jose luis jara jara
Joined: 18 Apr 2019
Posts: 114
Location: Fuenlabrada
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Posted: Jun 29, 2019 16:29 Post subject: Re: Collection of Fiebre Verde |
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It is a piece with tiny crystals but bullies, I would not mind having a piece so small.
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
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Posted: Jun 29, 2019 16:57 Post subject: Re: Collection of Fiebre Verde |
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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
Joined: 11 Sep 2013
Posts: 942
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 |
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23760 Time(s) |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
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 |
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Added a new Coscuez locality |
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23490 Time(s) |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
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 |
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23218 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 |
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23236 Time(s) |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
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 |
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22511 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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22525 Time(s) |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
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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22403 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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22370 Time(s) |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
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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22280 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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22297 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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22263 Time(s) |
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Philippe Durand
Joined: 10 May 2016
Posts: 628
Location: Normandie
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
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: 628
Location: Normandie
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
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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21584 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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21582 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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21576 Time(s) |
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