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Bergur_E_Sigurdarson
Joined: 21 Dec 2017
Posts: 147
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: 942
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 |
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20466 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 |
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20444 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 |
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20457 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 |
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20471 Time(s) |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
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 |
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20383 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 |
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20384 Time(s) |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
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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20306 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 |
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20307 Time(s) |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
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 |
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20255 Time(s) |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
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Posted: Dec 29, 2019 10:38 Post subject: Re: Collection of Fiebre Verde - Gachalá (#773) |
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The first emerald occurrence in the Gachalá area was incidentally found by a farmer of La Vega de San Juan in the early 1950s.
The farmer hid his discovery for a while but eventually confided in a friend about it.
It wasn't long before the word went round in all the emerald circles in Bogota and in 1953, 100s of adventurers dashed to the new bonanza. The Colombian government had to send in the army to take control and restore order.
Formal mining started in the late 50s.
That's how this new emerald district of the Eastern Belt was born - a pretty classic story.
In Gachalá, emeralds occur in limonite or kaolin deposits in fractures which explains why in matrix specimens are difficult to obtain.
These 3 Gachalá specimens are among the most famous emerald specimens which have been found in Colombia:
'The Gachalá Emerald' found in La Vega de San Juan mine in 1967 – 5cm x 5cm x 5cm, 858 cts – On display at Smithsonian's Natural History Museum in Washington D.C.
'La Emilia' found in Las Cruces mine in 1969 – 7,025 cts – Current whereabouts unknown
'El Monstro' found in Las Cruces mine in 1986 – 16,020 cts, a monster of 3,204 grams!! Possibly the largest emerald crystal ever found – Current whereabouts unknown
Gachalá specimens are not easy to find these days and I am pretty happy to have this less than 3-carat crystal in my collection ;-)
Matrix is oxidized which prevents identifying associated minerals.
Mineral: | Beryl (variety emerald) |
Locality: | Gachalá mining district, El Toro Mine, Municipio Gachalá, Eastern Emerald Belt, Cundinamarca Department, Colombia | |
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Dimensions: | 19mm x 19mm x 18mm, xl=8mm |
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20169 Time(s) |
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Mineral: | Beryl (variety emerald) |
Locality: | Gachalá mining district, El Toro Mine, Municipio Gachalá, Eastern Emerald Belt, Cundinamarca Department, Colombia | |
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Dimensions: | 19mm x 19mm x 18mm, xl=8mm |
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20167 Time(s) |
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Mineral: | Beryl (variety emerald) |
Locality: | Gachalá mining district, El Toro Mine, Municipio Gachalá, Eastern Emerald Belt, Cundinamarca Department, Colombia | |
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Dimensions: | 19mm x 19mm x 18mm, xl=8mm |
Description: |
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20172 Time(s) |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
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Posted: Dec 30, 2019 12:16 Post subject: Re: Collection of Fiebre Verde - Chivor (#770) |
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Still catching up on my photos...
On my last trip to Colombia, I was really lucky to find two specimens "fresh from the mine" (as they sometimes say before Christmas - it helps drawing customer's attention and adds a significant premium to the price which in turn helps cover Christmas expenses).
As there is currently a serious shortage of natural specimens, there is also plenty of "fresh from the lab" artwork available in the market (sold usually at the price of natural specimens).
Here is the first specimen (*not* artwork).
Semi-transparent beryl crystals with a typical Chivor bluish-green color standing on a white laminar albite matrix.
Second specimen is on the way ;-)
Mineral: | Beryl (variety emerald), Pyrite, Albite (variety cleavelandite) |
Locality: | Chivor mining district, Porvenir Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | 17mm x 12mm x 12mm, main xl=9mm |
Description: |
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20066 Time(s) |
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Mineral: | Beryl (variety emerald), Pyrite, Albite (variety cleavelandite) |
Locality: | Chivor mining district, Porvenir Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | 17mm x 12mm x 12mm, main xl=9mm |
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20082 Time(s) |
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Mineral: | Beryl (variety emerald), Pyrite, Albite (variety cleavelandite) |
Locality: | Chivor mining district, Porvenir Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | 36mm x 17mm x 26mm, xl=6mm |
Description: |
Colors are warmer with a black background - same lighting conditions |
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20096 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 31, 2019 05:14 Post subject: Re: Collection of Fiebre Verde |
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Philippe Durand wrote: | that is a cute thumbnail |
Merci Philippe!
Yes, it was a very pleasant surprise to find these small samples considering there was close to nothing available in terms of good quality specimens.
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
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Posted: Jan 01, 2020 13:15 Post subject: Re: Collection of Fiebre Verde - Chivor (#771) |
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This is the other specimen I was mentioning in my previous post.
Happy New Year to everyone!
Mineral: | Beryl (variety emerald), Pyrite, Albite (variety cleavelandite) |
Locality: | Chivor mining district, Porvenir Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | 19mm x 13mm x 20mm, main xl=9mm |
Description: |
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Viewed: |
19925 Time(s) |
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Mineral: | Beryl (variety emerald), Pyrite, Albite (variety cleavelandite) |
Locality: | Chivor mining district, Porvenir Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | 19mm x 13mm x 20mm, main xl=9mm |
Description: |
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Viewed: |
19913 Time(s) |
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Mineral: | Beryl (variety emerald), Pyrite, Albite (variety cleavelandite) |
Locality: | Chivor mining district, Porvenir Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | 19mm x 13mm x 20mm, main xl=9mm |
Description: |
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19957 Time(s) |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
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Posted: Jan 07, 2020 04:33 Post subject: Re: Collection of Fiebre Verde - Chivor (#767) |
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Chivor specimen from an old collection.
Calcite matrix with patches of 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: | 35mm x 38mm x 37mm, xl=5mm |
Description: |
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19787 Time(s) |
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Locality: | Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | 35mm x 38mm x 37mm, xl=5mm |
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19779 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: | 35mm x 38mm x 37mm, xl=5mm |
Description: |
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19788 Time(s) |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
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Posted: Jan 14, 2020 16:22 Post subject: Re: Collection of Fiebre Verde - La Pita (#764) |
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Rare crystal topped by an atypical pointed termination.
'Botella' (bottle in Spanish) is the local name given for this crystal form.
Emerald 'botellas' are only seen in La Pita.
I don't know what's the growth mechanism that triggers this crystal form.
Any idea?
Mineral: | Beryl (variety emerald) |
Locality: | La Pita mining district, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | 9mm |
Description: |
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Viewed: |
19647 Time(s) |
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Mineral: | Beryl (variety emerald) |
Locality: | La Pita mining district, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | 9mm |
Description: |
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19642 Time(s) |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
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Posted: Feb 16, 2020 12:22 Post subject: Re: Collection of Fiebre Verde - Chivor (#707) |
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20+ aggregates of dioptase-green emeralds crystals.
Matrix is a fine-grained whitish albitite [albitized black shale] which takes the form a stratiform breccia containing some lenses of the original black shale.
In the upper part of the matrix, the red melange partially cemented by pyrite and iron-rich dolomite is actually ankerite (crumbly aspect).
Ankerite is a carbonate mineral which occurs as a product of hydrothermal deposition (and alteration) in the two Colombian emerald belts.
Associated with pyrite, calcite ankerite, on a fine-grained albitite matrix.
Mineral: | Beryl (variety emerald), Pyrite, Calcite, Ankerite |
Locality: | Chivor Mining District, Camoyo Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | 70mm x 94mm x 76mm |
Description: |
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19394 Time(s) |
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Mineral: | Beryl (variety emerald), Pyrite, Calcite, Ankerite |
Locality: | Chivor Mining District, Camoyo Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | 70mm x 94mm x 76mm |
Description: |
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Viewed: |
19333 Time(s) |
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Firmo Espinar
Joined: 05 Apr 2017
Posts: 758
Location: Medellín, Colombia.
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Posted: Feb 24, 2020 07:13 Post subject: Re: Collection of Fiebre Verde |
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Hi Gerard.
Congratulations!!
A new blue star for the greenest collection ever seen!!!
Thanks for sharing with us these awesome crystals.
Regards.
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
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Posted: Feb 24, 2020 12:51 Post subject: Re: Collection of Fiebre Verde |
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Firmo Espinar wrote: | Hi Gerard.
Congratulations!!
A new blue star for the greenest collection ever seen!!!
Thanks for sharing with us these awesome crystals.
Regards. |
Hola Firmo
I appreciate your kind words which have special resonance for me.
By living in Colombia you are in a better position than anyone else to understand how much it takes to assemble an emerald collection.
Un saludo
Gérard
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Don Lum
Joined: 03 Sep 2012
Posts: 2869
Location: Arkansas
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Posted: Feb 24, 2020 14:09 Post subject: Re: Collection of Fiebre Verde |
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Hello Gerard,
Congratulations on your new Blue Star !
Well deserved and well done.
Regards,
Don
_________________ hogwild |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
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Posted: Feb 24, 2020 15:30 Post subject: Re: Collection of Fiebre Verde |
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Don Lum wrote: | Hello Gerard,
Congratulations on your new Blue Star !
Well deserved and well done.
Regards,
Don |
Hi Don,
I truly appreciate your comments.
Your collection is inspirational and you paved the way for many of us.
Regards
Gérard
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Sante Celiberti
Joined: 04 Oct 2019
Posts: 699
Location: Tuscany
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Posted: Feb 24, 2020 16:42 Post subject: Re: Collection of Fiebre Verde |
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Chaleureuses félicitations, Gerard.
We all suspect that you would have preferred a green star instead of a blue one. :-)
Warm greetings.
Sante
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
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Posted: Feb 25, 2020 02:20 Post subject: Re: Collection of Fiebre Verde |
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Sante Celiberti wrote: | Chaleureuses félicitations, Gerard.
We all suspect that you would have preferred a green star instead of a blue one. :-)
Warm greetings.
Sante |
Merci beaucoup Sante!
Although green is my preferred color, I am also open to blue :-)
I started adding Colombian blue stars (aka euclase) into my collection a while ago but they are difficult to find and I am left with no option than to compensate with their green counterparts.
Calorosi saluti
Gérard
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Philippe Durand
Joined: 10 May 2016
Posts: 628
Location: Normandie
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