View previous topic :: View next topic |
Author |
Message |
Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
|
Posted: Aug 10, 2015 16:41 Post subject: Re: Collection of Fiebre Verde - Cluster from La Pita (#564) |
|
|
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 | |
|
Dimensions: | 21x17x20mm, largest xl=18mm (H) |
Description: |
|
Viewed: |
33534 Time(s) |
|
|
|
Back to top |
|
|
Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
|
Posted: Aug 11, 2015 15:51 Post subject: Re: Collection of Fiebre Verde - Coscuez (#563) |
|
|
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 | |
|
Dimensions: | 51x46x46mm, cluster=20mm |
Description: |
|
Viewed: |
33477 Time(s) |
|
Mineral: | Beryl (variety emerald), Calcite |
Locality: | Coscuez mining district, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia | |
|
Dimensions: | 51x46x46mm, cluster=20mm |
Description: |
|
Viewed: |
33432 Time(s) |
|
Mineral: | Beryl (variety emerald), Calcite |
Locality: | Coscuez mining district, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia | |
|
Dimensions: | 51x46x46mm, cluster=20mm |
Description: |
|
Viewed: |
33447 Time(s) |
|
|
|
Back to top |
|
|
Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
|
Posted: Aug 17, 2015 05:30 Post subject: Re: Collection of Fiebre Verde - Coscuez Aggregate (#558) |
|
|
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 | |
|
Dimensions: | 30x49x29mm, xl=9x4mm |
Description: |
|
Viewed: |
33338 Time(s) |
|
Mineral: | Beryl (variety emerald), Calcite |
Locality: | Coscuez mining district, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia | |
|
Dimensions: | 30x49x29mm, xl=9x4mm |
Description: |
|
Viewed: |
33329 Time(s) |
|
Mineral: | Beryl (variety emerald), Calcite |
Locality: | Coscuez mining district, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia | |
|
Dimensions: | 30x49x29mm, xl=9x4mm |
Description: |
|
Viewed: |
33329 Time(s) |
|
Mineral: | Beryl (variety emerald), Calcite |
Locality: | Coscuez mining district, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia | |
|
Dimensions: | 30x49x29mm, xl=9x4mm |
Description: |
|
Viewed: |
33356 Time(s) |
|
Mineral: | Beryl (variety emerald), Calcite |
Locality: | Coscuez mining district, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia | |
|
Dimensions: | 30x49x29mm, xl=9x4mm |
Description: |
|
Viewed: |
33352 Time(s) |
|
Mineral: | Beryl (variety emerald), Calcite |
Locality: | Coscuez mining district, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia | |
|
Dimensions: | 30x49x29mm, xl=9x4mm |
Description: |
|
Viewed: |
33319 Time(s) |
|
Mineral: | Beryl (variety emerald), Calcite |
Locality: | Coscuez mining district, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia | |
|
Dimensions: | 30x49x29mm, xl=9x4mm |
Description: |
|
Viewed: |
33363 Time(s) |
|
|
|
Back to top |
|
|
Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
|
Posted: Aug 18, 2015 08:48 Post subject: Re: Collection of Fiebre Verde - Muzo with doubly terminated quartz (#568) |
|
|
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 | |
|
Dimensions: | Beryl=9mm Quartz=13mm |
Description: |
|
Viewed: |
33270 Time(s) |
|
Mineral: | Beryl (variety emerald), Quartz |
Locality: | Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia | |
|
Dimensions: | Beryl=9mm Quartz=13mm |
Description: |
|
Viewed: |
33288 Time(s) |
|
Mineral: | Beryl (variety emerald), Quartz |
Locality: | Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia | |
|
Dimensions: | Beryl=9mm Quartz=13mm |
Description: |
|
Viewed: |
33281 Time(s) |
|
Mineral: | Beryl (variety emerald), Quartz |
Locality: | Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia | |
|
Dimensions: | Beryl=9mm Quartz=13mm |
Description: |
|
Viewed: |
33231 Time(s) |
|
Mineral: | Beryl (variety emerald), Quartz |
Locality: | Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia | |
|
Dimensions: | Beryl=9mm Quartz=13mm |
Description: |
|
Viewed: |
33288 Time(s) |
|
|
|
Back to top |
|
|
Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
|
Posted: Aug 26, 2015 14:28 Post subject: Re: Collection of Fiebre Verde - Muzo (#561) |
|
|
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 | |
|
Dimensions: | 65x49x45mm, xl=8x6mm |
Description: |
|
Viewed: |
33168 Time(s) |
|
Mineral: | Beryl (variety emerald), Calcite, Pyrite |
Locality: | Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia | |
|
Dimensions: | 65x49x45mm, xl=8x6mm |
Description: |
|
Viewed: |
33169 Time(s) |
|
Mineral: | Beryl (variety emerald), Calcite, Pyrite |
Locality: | Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia | |
|
Dimensions: | 65x49x45mm, xl=8x6mm |
Description: |
|
Viewed: |
33119 Time(s) |
|
|
|
Back to top |
|
|
Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
|
Posted: Aug 28, 2015 14:26 Post subject: Re: Collection of Fiebre Verde - Chivor with ??? (#569) |
|
|
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 | |
|
Dimensions: | 19x14x21mm, xl=7mm |
Description: |
|
Viewed: |
33044 Time(s) |
|
Mineral: | Beryl (variety emerald), Calcite, Pyrite |
Locality: | Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
|
Dimensions: | 19x14x21mm, xl=7mm |
Description: |
|
Viewed: |
33085 Time(s) |
|
Mineral: | Beryl (variety emerald), Calcite, Pyrite |
Locality: | Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
|
Dimensions: | 19x14x21mm, xl=7mm |
Description: |
|
Viewed: |
33095 Time(s) |
|
Mineral: | Beryl (variety emerald), Calcite, Pyrite |
Locality: | Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
|
Dimensions: | 19x14x21mm, xl=7mm |
Description: |
|
Viewed: |
33047 Time(s) |
|
Mineral: | Beryl (variety emerald), Calcite, Pyrite |
Locality: | Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
|
Dimensions: | 19x14x21mm, xl=7mm |
Description: |
|
Viewed: |
33173 Time(s) |
|
Mineral: | Beryl (variety emerald), Calcite, Pyrite |
Locality: | Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
|
Dimensions: | 19x14x21mm, xl=7mm |
Description: |
|
Viewed: |
33056 Time(s) |
|
|
|
Back to top |
|
|
Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
|
Posted: Aug 30, 2015 10:22 Post subject: Re: Collection of Fiebre Verde - Coscuez (#570) |
|
|
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 | |
|
Dimensions: | xls=12mm (aggregate) |
Description: |
|
Viewed: |
32933 Time(s) |
|
Mineral: | Beryl (variety emerald), Calcite |
Locality: | Coscuez mining district, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia | |
|
Dimensions: | Beryl xls=12mm (aggregate) & 9mm |
Description: |
|
Viewed: |
32958 Time(s) |
|
Mineral: | Beryl (variety emerald), Calcite |
Locality: | Coscuez mining district, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia | |
|
Dimensions: | Beryl xls=12mm (aggregate) & 9mm |
Description: |
|
Viewed: |
32965 Time(s) |
|
Mineral: | Beryl (variety emerald), Calcite |
Locality: | Coscuez mining district, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia | |
|
Dimensions: | Beryl xls=12mm (aggregate) & 9mm |
Description: |
Calcite with an unusual crystallization for the locality. |
|
Viewed: |
32990 Time(s) |
|
|
|
Back to top |
|
|
Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
|
Posted: Sep 05, 2015 03:59 Post subject: Re: Collection of Fiebre Verde - Chivor (#571) |
|
|
Host rock is gray shale.
Mineral: | Beryl (variety emerald), Calcite, Pyrite |
Locality: | Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
|
Dimensions: | largest xl=11mm |
Description: |
|
Viewed: |
32796 Time(s) |
|
Mineral: | Beryl (variety emerald), Calcite, Quartz |
Locality: | Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
|
Dimensions: | largest xl=11mm |
Description: |
|
Viewed: |
32937 Time(s) |
|
Mineral: | Beryl (variety emerald), Calcite, Pyrite |
Locality: | Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
|
Dimensions: | largest xl=11mm |
Description: |
|
Viewed: |
32784 Time(s) |
|
Mineral: | Beryl (variety emerald), Calcite, Pyrite |
Locality: | Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
|
Dimensions: | largest xl=11mm |
Description: |
|
Viewed: |
32823 Time(s) |
|
Mineral: | Beryl (variety emerald), Calcite, Pyrite |
Locality: | Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
|
Dimensions: | largest xl=11mm |
Description: |
|
Viewed: |
32786 Time(s) |
|
Mineral: | Beryl (variety emerald), Calcite, Pyrite |
Locality: | Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
|
Dimensions: | largest xl=11mm |
Description: |
|
Viewed: |
32778 Time(s) |
|
|
|
Back to top |
|
|
Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
|
Posted: Sep 09, 2015 15:01 Post subject: Re: Collection of Fiebre Verde - La Pita (#559) |
|
|
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 | |
|
Dimensions: | 47x24x34mm |
Description: |
|
Viewed: |
32591 Time(s) |
|
Mineral: | Beryl (variety emerald), Calcite |
Locality: | La Pita mining district, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia | |
|
Dimensions: | 47x24x34mm |
Description: |
|
Viewed: |
32600 Time(s) |
|
Mineral: | Beryl (variety emerald), Calcite |
Locality: | La Pita mining district, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia | |
|
Dimensions: | 47x24x34mm |
Description: |
|
Viewed: |
32598 Time(s) |
|
|
|
Back to top |
|
|
Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
|
Posted: Sep 21, 2015 13:53 Post subject: Re: Collection of Fiebre Verde - Cunas (#567) |
|
|
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 | |
|
Dimensions: | 31x21x20mm, xl=16x4mm |
Description: |
|
Viewed: |
32426 Time(s) |
|
Mineral: | Beryl (variety emerald), Calcite |
Locality: | La Pita mining district, Cunas Mine, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia | |
|
Dimensions: | 31x21x20mm, xl=16x4mm |
Description: |
|
Viewed: |
32485 Time(s) |
|
Mineral: | Beryl (variety emerald), Calcite |
Locality: | La Pita mining district, Cunas Mine, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia | |
|
Dimensions: | 31x21x20mm, xl=16x4mm |
Description: |
|
Viewed: |
32416 Time(s) |
|
Mineral: | Beryl (variety emerald), Calcite |
Locality: | La Pita mining district, Cunas Mine, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia | |
|
Dimensions: | 31x21x20mm, xl=16x4mm |
Description: |
|
Viewed: |
32422 Time(s) |
|
Mineral: | Beryl (variety emerald), Calcite |
Locality: | La Pita mining district, Cunas Mine, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia | |
|
Dimensions: | 31x21x20mm, xl=16x4mm |
Description: |
|
Viewed: |
32429 Time(s) |
|
Mineral: | Beryl (variety emerald), Calcite |
Locality: | La Pita mining district, Cunas Mine, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia | |
|
Dimensions: | 31x21x20mm, xl=16x4mm |
Description: |
|
Viewed: |
32455 Time(s) |
|
|
|
Back to top |
|
|
Jordi Fabre
Overall coordinator of the Forum
Joined: 07 Aug 2006
Posts: 4895
Location: Barcelona
|
Posted: Sep 21, 2015 15:32 Post subject: Re: Collection of Fiebre Verde - Cunas (#567) |
|
|
It seems Calcite to me (with inclusions)
|
|
Back to top |
|
|
Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
|
Posted: Sep 21, 2015 15:49 Post subject: Re: Collection of Fiebre Verde - Cunas (#567) |
|
|
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.
|
|
Back to top |
|
|
Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
|
Posted: Dec 12, 2015 15:46 Post subject: Re: Collection of Fiebre Verde - Calcite with deep striations - La Pita (#541) |
|
|
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 | |
|
Dimensions: | 7cm across |
Description: |
|
Viewed: |
31491 Time(s) |
|
Mineral: | Beryl (variety emerald), Calcite, Pyrite |
Locality: | La Pita mining district, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia | |
|
Dimensions: | 7cm across |
Description: |
|
Viewed: |
31480 Time(s) |
|
Mineral: | Beryl (variety emerald), Calcite, Pyrite |
Locality: | La Pita mining district, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia | |
|
Dimensions: | 7cm across |
Description: |
|
Viewed: |
31511 Time(s) |
|
Mineral: | Beryl (variety emerald), Calcite, Pyrite |
Locality: | La Pita mining district, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia | |
|
Dimensions: | 7cm across |
Description: |
|
Viewed: |
31458 Time(s) |
|
Mineral: | Beryl (variety emerald), Calcite, Pyrite |
Locality: | La Pita mining district, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia | |
|
Dimensions: | 7cm across |
Description: |
|
Viewed: |
31503 Time(s) |
|
|
|
Back to top |
|
|
yowanni
Joined: 27 Feb 2008
Posts: 37
Location: Spain (Cantabria / Madrid)
|
Posted: Dec 16, 2015 02:47 Post subject: Re: Collection of Fiebre Verde |
|
|
Hello Fiebre Verde,
It seems like an etching-dissolution pattern.
|
|
Back to top |
|
|
Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
|
Posted: Dec 16, 2015 15:45 Post subject: Re: Collection of Fiebre Verde |
|
|
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
|
|
Back to top |
|
|
Jordi Fabre
Overall coordinator of the Forum
Joined: 07 Aug 2006
Posts: 4895
Location: Barcelona
|
Posted: Dec 16, 2015 17:02 Post subject: Re: Collection of Fiebre Verde |
|
|
It looks anthropogenic to me...
|
|
Back to top |
|
|
Ricardo Melendez
Joined: 21 Apr 2014
Posts: 70
Location: Estado de Mexico
|
Posted: Dec 16, 2015 17:47 Post subject: Re: Collection of Fiebre Verde |
|
|
I have seen calcites with that pattern after hydrochloric acid treatment.
very likely in your specimen.
|
|
Back to top |
|
|
minsur
Joined: 03 Feb 2015
Posts: 45
|
Posted: Dec 16, 2015 18:07 Post subject: Re: Collection of Fiebre Verde |
|
|
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...
|
|
Back to top |
|
|
Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
|
Posted: Dec 17, 2015 01:31 Post subject: Re: Collection of Fiebre Verde |
|
|
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
|
|
Back to top |
|
|
Fiebre Verde
Joined: 11 Sep 2013
Posts: 942
Location: Paris Area
|
Posted: Dec 20, 2015 15:47 Post subject: Re: Collection of Fiebre Verde - Chivor (#573) |
|
|
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 | |
|
Dimensions: | 63x45x15mm, main xl=10mm |
Description: |
|
Viewed: |
30943 Time(s) |
|
Mineral: | Beryl (Var. Emerald), Dolomite, Pyrite |
Locality: | Chivor mining district, Palo Arañado Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
|
Dimensions: | 63x45x15mm, main xl=10mm |
Description: |
|
Viewed: |
30861 Time(s) |
|
|
|
Back to top |
|
|
|