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Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
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Posted: Aug 10, 2015 16:41 Post subject: Re: Collection of Fiebre Verde - Cluster from La Pita (#564) |
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A cluster from the Cunas mine which has been continuously producing fine emeralds in the past few years.
The Cunas mine was privately owned by the emerald czar Victor Carranza.
Mineral: | Beryl (variety emerald), Calcite |
Locality: | La Pita mining district, Cunas Mine, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | 21x17x20mm, largest xl=18mm (H) |
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33524 Time(s) |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
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Posted: Aug 11, 2015 15:51 Post subject: Re: Collection of Fiebre Verde - Coscuez (#563) |
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The beryls are associated with black and white calcite. No host rock.
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: | 51x46x46mm, cluster=20mm |
Description: |
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33467 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: | 51x46x46mm, cluster=20mm |
Description: |
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33421 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: | 51x46x46mm, cluster=20mm |
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33437 Time(s) |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
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Posted: Aug 17, 2015 05:30 Post subject: Re: Collection of Fiebre Verde - Coscuez Aggregate (#558) |
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Aggregate of 3 crystals.
Host rock is black shale.
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: | 30x49x29mm, xl=9x4mm |
Description: |
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33328 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: | 30x49x29mm, xl=9x4mm |
Description: |
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33319 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: | 30x49x29mm, xl=9x4mm |
Description: |
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Viewed: |
33319 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: | 30x49x29mm, xl=9x4mm |
Description: |
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33346 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: | 30x49x29mm, xl=9x4mm |
Description: |
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Viewed: |
33342 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: | 30x49x29mm, xl=9x4mm |
Description: |
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Viewed: |
33309 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: | 30x49x29mm, xl=9x4mm |
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33353 Time(s) |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
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Posted: Aug 18, 2015 08:48 Post subject: Re: Collection of Fiebre Verde - Muzo with doubly terminated quartz (#568) |
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Doubly terminated quartz are not commonly seen in the Colombian emerald belts.
Note that the beryl crystal is also terminated.
The little story behind this specimen is pretty common.
The dealer had a small lot of high quality thumbnail specimens which he had on deposit from a comisionista (Local name for the emerald brokers in Colombia - owners rarely sell directly their goods).
Even after buying the lot, I could never get hold of the comisionista's name and even less the owner's name...
Sources are jealously protected specially in the small market of Bogota - nothing really surprising here.
Makes the hunt a bit more challenging (and pricey).
Mineral: | Beryl (variety emerald), Quartz |
Locality: | Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | Beryl=9mm Quartz=13mm |
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33260 Time(s) |
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Mineral: | Beryl (variety emerald), Quartz |
Locality: | Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | Beryl=9mm Quartz=13mm |
Description: |
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Viewed: |
33278 Time(s) |
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Mineral: | Beryl (variety emerald), Quartz |
Locality: | Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | Beryl=9mm Quartz=13mm |
Description: |
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33271 Time(s) |
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Mineral: | Beryl (variety emerald), Quartz |
Locality: | Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | Beryl=9mm Quartz=13mm |
Description: |
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Viewed: |
33221 Time(s) |
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Mineral: | Beryl (variety emerald), Quartz |
Locality: | Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | Beryl=9mm Quartz=13mm |
Description: |
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33278 Time(s) |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
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Posted: Aug 26, 2015 14:28 Post subject: Re: Collection of Fiebre Verde - Muzo (#561) |
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Very likely from La Pava which is the westernmost mine of the Muzo mining district.
Host rock is black shale.
Mineral: | Beryl (variety emerald), Calcite, Pyrite |
Locality: | Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | 65x49x45mm, xl=8x6mm |
Description: |
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Viewed: |
33158 Time(s) |
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Mineral: | Beryl (variety emerald), Calcite, Pyrite |
Locality: | Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | 65x49x45mm, xl=8x6mm |
Description: |
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Viewed: |
33159 Time(s) |
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Mineral: | Beryl (variety emerald), Calcite, Pyrite |
Locality: | Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | 65x49x45mm, xl=8x6mm |
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33109 Time(s) |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
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Posted: Aug 28, 2015 14:26 Post subject: Re: Collection of Fiebre Verde - Chivor with ??? (#569) |
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This Chivor specimen is very likely from San Gregorio mine.
I have seen the black opaque crystal with sharp edges featured in the last image on several Chivor specimens but can't figure out what it is. A Dolomite rhomb?
Host rock is a crumbly grey shale.
Mineral: | Beryl (variety emerald), Calcite, Pyrite |
Locality: | Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | 19x14x21mm, xl=7mm |
Description: |
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Viewed: |
33034 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: | 19x14x21mm, xl=7mm |
Description: |
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Viewed: |
33074 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: | 19x14x21mm, xl=7mm |
Description: |
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Viewed: |
33085 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: | 19x14x21mm, xl=7mm |
Description: |
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Viewed: |
33037 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: | 19x14x21mm, xl=7mm |
Description: |
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Viewed: |
33163 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: | 19x14x21mm, xl=7mm |
Description: |
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33046 Time(s) |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
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Posted: Aug 30, 2015 10:22 Post subject: Re: Collection of Fiebre Verde - Coscuez (#570) |
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Another little aggregate from Coscuez.
No host rock.
Mineral: | Beryl (variety emerald) |
Locality: | Coscuez mining district, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | xls=12mm (aggregate) |
Description: |
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Viewed: |
32923 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: | Beryl xls=12mm (aggregate) & 9mm |
Description: |
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Viewed: |
32948 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: | Beryl xls=12mm (aggregate) & 9mm |
Description: |
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Viewed: |
32955 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: | Beryl xls=12mm (aggregate) & 9mm |
Description: |
Calcite with an unusual crystallization for the locality. |
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Viewed: |
32980 Time(s) |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
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Posted: Sep 05, 2015 03:59 Post subject: Re: Collection of Fiebre Verde - Chivor (#571) |
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Host rock is gray shale.
Mineral: | Beryl (variety emerald), Calcite, Pyrite |
Locality: | Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | largest xl=11mm |
Description: |
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Viewed: |
32786 Time(s) |
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Mineral: | Beryl (variety emerald), Calcite, Quartz |
Locality: | Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | largest xl=11mm |
Description: |
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Viewed: |
32927 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: | largest xl=11mm |
Description: |
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Viewed: |
32774 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: | largest xl=11mm |
Description: |
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Viewed: |
32813 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: | largest xl=11mm |
Description: |
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Viewed: |
32776 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: | largest xl=11mm |
Description: |
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Viewed: |
32768 Time(s) |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
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Posted: Sep 09, 2015 15:01 Post subject: Re: Collection of Fiebre Verde - La Pita (#559) |
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This aggregate was sold to me as from Chivor but the vivid grass-green coloration makes me think that it's actually from the La Pita mining district.
Out of the three chromophoric elements (V, Cr, Fe) of natural emeralds, only vanadium and chromium are found in significant concentration in Colombian emeralds.
Various studies have shown that the ratio of V/Cr is much higher in the La Pita emeralds than in any of the other Colombian districts.
The high concentration of vanadium versus chromium is responsible for the grass-green coloration of the La Pita emeralds.
Mineral: | Beryl (variety emerald), Calcite |
Locality: | La Pita mining district, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | 47x24x34mm |
Description: |
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Viewed: |
32580 Time(s) |
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Mineral: | Beryl (variety emerald), Calcite |
Locality: | La Pita mining district, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | 47x24x34mm |
Description: |
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Viewed: |
32589 Time(s) |
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Mineral: | Beryl (variety emerald), Calcite |
Locality: | La Pita mining district, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | 47x24x34mm |
Description: |
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Viewed: |
32586 Time(s) |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
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Posted: Sep 21, 2015 13:53 Post subject: Re: Collection of Fiebre Verde - Cunas (#567) |
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A Cunas specimen with a doubly terminated beryl crystal.
This locality has been continuously producing spectacular specimens over the past 12-13 years.
Not sure about the smoked crystals contained in the vug (2 last pictures). Quartz?
Mineral: | Beryl (variety emerald), Calcite |
Locality: | La Pita mining district, Cunas Mine, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | 31x21x20mm, xl=16x4mm |
Description: |
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Viewed: |
32416 Time(s) |
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Mineral: | Beryl (variety emerald), Calcite |
Locality: | La Pita mining district, Cunas Mine, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | 31x21x20mm, xl=16x4mm |
Description: |
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Viewed: |
32474 Time(s) |
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Mineral: | Beryl (variety emerald), Calcite |
Locality: | La Pita mining district, Cunas Mine, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | 31x21x20mm, xl=16x4mm |
Description: |
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Viewed: |
32406 Time(s) |
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Mineral: | Beryl (variety emerald), Calcite |
Locality: | La Pita mining district, Cunas Mine, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | 31x21x20mm, xl=16x4mm |
Description: |
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Viewed: |
32412 Time(s) |
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Mineral: | Beryl (variety emerald), Calcite |
Locality: | La Pita mining district, Cunas Mine, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | 31x21x20mm, xl=16x4mm |
Description: |
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Viewed: |
32419 Time(s) |
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Mineral: | Beryl (variety emerald), Calcite |
Locality: | La Pita mining district, Cunas Mine, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | 31x21x20mm, xl=16x4mm |
Description: |
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Viewed: |
32445 Time(s) |
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Jordi Fabre
Overall coordinator of the Forum
Joined: 07 Aug 2006
Posts: 4894
Location: Barcelona
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Posted: Sep 21, 2015 15:32 Post subject: Re: Collection of Fiebre Verde - Cunas (#567) |
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It seems Calcite to me (with inclusions)
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
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Posted: Sep 21, 2015 15:49 Post subject: Re: Collection of Fiebre Verde - Cunas (#567) |
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Jordi Fabre wrote: |
It seems Calcite to me (with inclusions) |
Agree, calcite seems a more reasonable guess Jordi.
Never seen specimens with quartz vugs in the emerald districts.
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
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Posted: Dec 12, 2015 15:46 Post subject: Re: Collection of Fiebre Verde - Calcite with deep striations - La Pita (#541) |
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Calcite crystals show deep striations.
Striated calcite is not uncommon in the La Pita district but this specimen exhibits a pattern which looks more like a series of ridges than ordinary striation.
I would love to hear an explanation on this - growth pattern? else?
Mineral: | Beryl (variety emerald), Calcite, Pyrite |
Locality: | La Pita mining district, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | 7cm across |
Description: |
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Viewed: |
31481 Time(s) |
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Mineral: | Beryl (variety emerald), Calcite, Pyrite |
Locality: | La Pita mining district, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | 7cm across |
Description: |
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Viewed: |
31470 Time(s) |
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Mineral: | Beryl (variety emerald), Calcite, Pyrite |
Locality: | La Pita mining district, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | 7cm across |
Description: |
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Viewed: |
31501 Time(s) |
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Mineral: | Beryl (variety emerald), Calcite, Pyrite |
Locality: | La Pita mining district, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | 7cm across |
Description: |
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Viewed: |
31448 Time(s) |
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Mineral: | Beryl (variety emerald), Calcite, Pyrite |
Locality: | La Pita mining district, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | 7cm across |
Description: |
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Viewed: |
31493 Time(s) |
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yowanni
Joined: 27 Feb 2008
Posts: 37
Location: Spain (Cantabria / Madrid)
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Posted: Dec 16, 2015 02:47 Post subject: Re: Collection of Fiebre Verde |
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Hello Fiebre Verde,
It seems like an etching-dissolution pattern.
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
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Posted: Dec 16, 2015 15:45 Post subject: Re: Collection of Fiebre Verde |
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yowanni wrote: | Hello Fiebre Verde,
It seems like an etching-dissolution pattern. |
Thanks for answering Yowanni!
I ruled out this possibility because of the geometric regularity of the patterns observed on all faces of the calcite crystals.
I am interested to know if anyone here has already came across this type of patterns.
Gérard
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Jordi Fabre
Overall coordinator of the Forum
Joined: 07 Aug 2006
Posts: 4894
Location: Barcelona
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Posted: Dec 16, 2015 17:02 Post subject: Re: Collection of Fiebre Verde |
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It looks anthropogenic to me...
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Ricardo Melendez
Joined: 21 Apr 2014
Posts: 70
Location: Estado de Mexico
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Posted: Dec 16, 2015 17:47 Post subject: Re: Collection of Fiebre Verde |
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I have seen calcites with that pattern after hydrochloric acid treatment.
very likely in your specimen.
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minsur
Joined: 03 Feb 2015
Posts: 45
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Posted: Dec 16, 2015 18:07 Post subject: Re: Collection of Fiebre Verde |
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A combined process to form "interesting looking crystals" out of damaged or cleaved Calcite???
First a scratch job with a file (pocket-knife-file?) and then a short acid bath?
So much work to manufacture an average specimen, at best?
More questions than answers...
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
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Posted: Dec 17, 2015 01:31 Post subject: Re: Collection of Fiebre Verde |
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Thanks Minsur, Jordi & Rocardo. Seems like we have a consensus on the origin of these strange patterns!
This does not really come as a surprise to me as emerald sculptures and carvings is an important business in Bogota. Usually the artistic emphasis is focused on the low-grade emerald material and not the surrounding crystals!
Can't remember how this specimen ended up in my collection.
Gérard
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
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Posted: Dec 20, 2015 15:47 Post subject: Re: Collection of Fiebre Verde - Chivor (#573) |
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A recent find from the Chivor district.
Pyrite is partly oxidized.
Mineral: | Beryl (Var. Emerald), Dolomite, Pyrite |
Locality: | Chivor mining district, Palo Arañado Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | 63x45x15mm, main xl=10mm |
Description: |
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Viewed: |
30933 Time(s) |
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Mineral: | Beryl (Var. Emerald), Dolomite, Pyrite |
Locality: | Chivor mining district, Palo Arañado Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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Dimensions: | 63x45x15mm, main xl=10mm |
Description: |
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Viewed: |
30851 Time(s) |
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