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Collection of Fiebre Verde
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Fiebre Verde




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PostPosted: Nov 04, 2018 10:48    Post subject: Re: Collection of Fiebre Verde  

Josele wrote:
Lovely apatite Gérard, and from a unusual locality, thanks for sharing. It's a pleasure this pink touch in your green jungle.
Color and transparency reminds me some Baltistan apatites that are very fluorescent, especially under short wave. Did you checked fluorescence?

Many thanks for your appreciation Josele!
Although I don't need to restate that I am slightly biased towards the green variety of beryls, I am interested in all matrix specimens when visiting Colombia (Which happens 2-3 times a year).
Problem is that apatite, parisite, euclase, barite, or even sphalerite are rarely seen in matrix in the Bogota market.
Matrix specimens are undervalued by the miners who believe they can make a good business by extracting and selling crystals - probably a habit inherited from the way emeralds are mined.
I wish I could find that unknown miner who understood what he was doing by carefully extracting that matrix specimen, and congratulate him on the fantastic job he has done!
Regarding your last comment... I have yet to invest in a short-wave UV lamp :-(
Gérard
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Bergur_E_Sigurdarson




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PostPosted: Nov 04, 2018 12:12    Post subject: Re: Collection of Fiebre Verde  

I have a few of the Colombian Fluor-Apatites, and they do light up a nice pink under my Convoy... no idea about SW though.

And I do agree with the problem in Colombia of loose crystals over specimens on matrix....
...and in my opinion another problem related to buying anything other than emeralds is that sellers tend to think that everything should be priced like emeralds!
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Fiebre Verde




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PostPosted: Nov 04, 2018 13:03    Post subject: Re: Collection of Fiebre Verde  

Bergur_E_Sigurdarson wrote:

And I do agree with the problem in Colombia of loose crystals over specimens on matrix....
...and in my opinion another problem related to buying anything other than emeralds is that sellers tend to think that everything should be priced like emeralds!

Exactly! In the local mineral business - which is by the way only a side business - emeralds set the price standards.
And when discussing the price with the seller, it is difficult to cut out the artificial inflation of prices with sensible arguments.
The negotiation becomes even more difficult if the specimen comes from one of the emerald districts.
And if that mineral happens to be green then it must be emerald - no wonder why the most expensive fuchsites on earth are from Colombia :-)
Gérard
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Fiebre Verde




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PostPosted: Nov 06, 2018 02:33    Post subject: Re: Collection of Fiebre Verde - Chivor (#716)  

Aggregate of semi-transparent vivid green beryl crystals.


IMG_0181nb.JPG
 Mineral: Beryl (variety emerald), Pyrite, Calcite, Albite (variety cleavelandite)
 Locality:
Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 58x43x34mm, aggregate of xls up to 11mm
 Description:
 Viewed:  457 Time(s)

IMG_0181nb.JPG


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Fiebre Verde




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PostPosted: Nov 11, 2018 07:34    Post subject: Re: Collection of Fiebre Verde - Cunas (#718)  

Semi-transparent beryl crystals.
Lustrous opalescent dolomite and calcite set against a contrasting black shale matrix (not visible in the image).



IMG_0286nb.JPG
 Mineral: Beryl (variety emerald), Calcite, Dolomite
 Locality:
La Pita mining district, Cunas Mine, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 53x35x25mm, main xl=31x7mm
 Description:
 Viewed:  290 Time(s)

IMG_0286nb.JPG


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Fiebre Verde




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PostPosted: Nov 17, 2018 08:52    Post subject: Re: Collection of Fiebre Verde - Chivor (#715)  

Crystal exhibits the typical Chivor bluish cast.
Host rock is black shale.



IMG_0118nb.JPG
 Mineral: Beryl (variety emerald), Pyrite, Calcite, Dolomite
 Locality:
Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 41x30x20mm, xl=9mm
 Description:
 Viewed:  124 Time(s)

IMG_0118nb.JPG



IMG_0170nb.JPG
 Mineral: Beryl (variety emerald), Pyrite, Calcite, Dolomite
 Locality:
Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia
 Dimensions: 41x30x20mm, xl=9mm
 Description:
 Viewed:  123 Time(s)

IMG_0170nb.JPG


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