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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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33744 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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33684 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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33640 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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33653 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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33545 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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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: | 30x49x29mm, xl=9x4mm |
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: | 30x49x29mm, xl=9x4mm |
Description: |
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33568 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: |
33564 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: |
33531 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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33574 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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33479 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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33497 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: |
33488 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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33439 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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33498 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: |
33379 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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33380 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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33328 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: |
33252 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: |
33294 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: |
33303 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: |
33255 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: |
33381 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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33264 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: |
33143 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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33166 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: |
33173 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: |
33199 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: |
33005 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: |
33146 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: |
32993 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: |
33032 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: |
32995 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: |
32986 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: |
32799 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: |
32807 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: |
32805 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: |
32633 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: |
32692 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: |
32625 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: |
32630 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: |
32637 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: |
32662 Time(s) |
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Jordi Fabre
Overall coordinator of the Forum
Joined: 07 Aug 2006
Posts: 4899
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: |
31701 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: |
31689 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: |
31721 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: |
31668 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: |
31711 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: 4899
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: |
31152 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: |
31070 Time(s) |
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