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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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34112 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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34054 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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34009 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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34025 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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33914 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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33912 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: |
33909 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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33939 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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33932 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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33899 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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33946 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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33849 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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33868 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 |
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33862 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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33812 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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33867 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: |
33748 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: |
33748 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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33696 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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33621 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: |
33662 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: |
33675 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: |
33624 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: |
33752 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: |
33635 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: |
33512 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: |
33537 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: |
33540 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: |
33570 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: |
33376 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: |
33517 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: |
33362 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: |
33403 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: |
33365 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: |
33358 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: |
33168 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: |
33177 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: |
33174 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: |
33001 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: |
33064 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: |
32995 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: |
32998 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: |
33010 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: |
33034 Time(s) |
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Jordi Fabre
Overall coordinator of the Forum
Joined: 07 Aug 2006
Posts: 4905
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: |
32073 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: |
32060 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: |
32091 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: |
32041 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: |
32081 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: 4905
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: |
31522 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: |
31441 Time(s) |
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