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Fiebre Verde
Joined: 11 Sep 2013
Posts: 944
Location: Paris Area
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 Posted: Jul 18, 2015 07:14 Post subject: Re: Collection of Fiebre Verde - Muzo with acicular ??? (#547) |
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Unusual specimen from Muzo.
Acicular crystal habit is not common at all in the 2 Colombian emerald districts.
Could be aragonite or calcite... or something else?
In the last close-up image, the brownish elongated crystal is very likely parisite.
Host rock is black shale.
| Mineral: | Beryl (variety emerald), Calcite, Parisite, Aragonite(?) |
| Locality: | | Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia |  |
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| Dimensions: | 38x40x31mm, xl=15x10mm |
| Description: |
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| Viewed: |
64434 Time(s) |
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| Mineral: | Beryl (variety emerald), Calcite, Parisite, Aragonite(?) |
| Locality: | | Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 38x40x31mm, xl=15x10mm |
| Description: |
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| Viewed: |
64378 Time(s) |
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| Mineral: | Beryl (variety emerald), Calcite, Parisite, Aragonite(?) |
| Locality: | | Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 38x40x31mm, xl=15x10mm |
| Description: |
| Complex crystallization patterns on the C-face. |
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| Viewed: |
64378 Time(s) |
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| Mineral: | Beryl (variety emerald), Calcite, Parisite, Aragonite(?) |
| Locality: | | Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 38x40x31mm, xl=15x10mm |
| Description: |
| Note the presence of acicular crystals all around the emerald. |
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| Viewed: |
64400 Time(s) |
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| Mineral: | Beryl (variety emerald), Calcite, Parisite, Aragonite(?) |
| Locality: | | Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 38x40x31mm, xl=15x10mm |
| Description: |
| Aragonite, calcite... or else? |
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| Viewed: |
64351 Time(s) |
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| Mineral: | Beryl (variety emerald), Calcite, Parisite, Aragonite(?) |
| Locality: | | Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 38x40x31mm, xl=15x10mm |
| Description: |
| Aragonite, calcite... or else? |
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| Viewed: |
64355 Time(s) |
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| Mineral: | Beryl (variety emerald), Calcite, Parisite, Aragonite(?) |
| Locality: | | Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 38x40x31mm, xl=15x10mm |
| Description: |
| FOV=10mm - Aragonite, calcite... or else? |
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| Viewed: |
64335 Time(s) |
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| Mineral: | Beryl (variety emerald), Calcite, Parisite, Aragonite(?) |
| Locality: | | Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 38x40x31mm, xl=15x10mm |
| Description: |
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| Viewed: |
64378 Time(s) |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 944
Location: Paris Area
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| Posted: Jul 18, 2015 12:24 Post subject: Re: Collection of Fiebre Verde - Dioptase (#9100) |
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For those who are sick and tired of seeing emeralds in this thread, here is a nice break (Well, sort of, it's still green!)
I just found out that rendering dioptase-green is even more difficult than emerald-green.
This specimen was purchased by my father in Brazzaville back in the early 70's.
I doesn't seem to be glued but I might be wrong.
As per the locality, I have no idea where it comes from, so your comments and suggestions are welcomed. I labeled it as from "Republic of the Congo" but it could as well be from the ex-Zaire.
| Mineral: | Dioptase |
| Locality: | | Republic of the Congo | |
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| Dimensions: | 145x95x75mm |
| Description: |
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| Viewed: |
64394 Time(s) |
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| Mineral: | Dioptase |
| Locality: | | Republic of the Congo | |
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| Dimensions: | 145x95x75mm |
| Description: |
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| Viewed: |
64385 Time(s) |
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Jordi Fabre
Overall coordinator of the Forum
Joined: 07 Aug 2006
Posts: 5077
Location: Barcelona
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| Posted: Jul 18, 2015 15:02 Post subject: Re: Collection of Fiebre Verde - Muzo with acicular ??? (#547) |
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It looks like Calcite-Aragonite. Is very easy to check it, try if it fizz in dilute HCl or if it dissolves inside vinegar (after 24 hours)
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Jordi Fabre
Overall coordinator of the Forum
Joined: 07 Aug 2006
Posts: 5077
Location: Barcelona
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| Posted: Jul 18, 2015 15:14 Post subject: Re: Collection of Fiebre Verde - Dioptase (#9100) |
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Well, it seems glued. Very easy to check it, just submerge the specimen in Acetone.during 1-2 hours
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 944
Location: Paris Area
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| Posted: Jul 18, 2015 15:15 Post subject: Re: Collection of Fiebre Verde - Muzo with acicular ??? (#547) |
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| Jordi Fabre wrote: |
It looks like Calcite-Aragonite. Is very easy to check it, try if it fizz in dilute HCl or if it dissolves inside vinegar (after 24 hours) |
Thanks Jordi - I will give it a try.
Gérard
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 944
Location: Paris Area
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| Posted: Jul 18, 2015 15:34 Post subject: Re: Collection of Fiebre Verde - Dioptase (#9100) |
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| Jordi Fabre wrote: |
Well, it seems glued. Very easy to check it, just submerge the specimen in Acetone.during 1-2 hours |
I was hoping not to hear this....
And if it is glued then I will lose the only "rock" my father left me :-(
(unless I glue everything back together of course).
I feel am engaged in a risky hobby more than ever.
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 944
Location: Paris Area
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| Posted: Jul 18, 2015 16:42 Post subject: Re: Collection of Fiebre Verde - Chivor (#548) |
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Chivor at its very best!
Host rock is black shale.
| Mineral: | Beryl (variety emerald), Calcite |
| Locality: | | Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 25x25x32mm, xl=8x3mm |
| Description: |
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| Viewed: |
64308 Time(s) |
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| Mineral: | Beryl (variety emerald), Calcite |
| Locality: | | Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 25x25x32mm, xl=8x3mm |
| Description: |
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| Viewed: |
64308 Time(s) |
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| Mineral: | Beryl (variety emerald), Calcite |
| Locality: | | Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 25x25x32mm, xl=8x3mm |
| Description: |
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| Viewed: |
64301 Time(s) |
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| Mineral: | Beryl (variety emerald), Calcite |
| Locality: | | Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 25x25x32mm, xl=8x3mm |
| Description: |
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| Viewed: |
64272 Time(s) |
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| Mineral: | Beryl (variety emerald), Calcite |
| Locality: | | Chivor mining district, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 25x25x32mm, xl=8x3mm |
| Description: |
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| Viewed: |
64286 Time(s) |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 944
Location: Paris Area
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| Posted: Jul 19, 2015 08:43 Post subject: Re: Collection of Fiebre Verde - Cunas (#551) |
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A beautifully balanced specimen from La Pita/Cunas with white calcite and oxidized pyrite.
Host rock is black shale (barely visible in the bottom left of the first image).
| Mineral: | Beryl (variety emerald), Calcite, Pyrite |
| Locality: | | La Pita mining district, Cunas Mine, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 26x17x30mm, xl=9x2mm |
| Description: |
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| Viewed: |
64191 Time(s) |
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| Mineral: | Beryl (variety emerald), Calcite, Pyrite |
| Locality: | | La Pita mining district, Cunas Mine, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 26x17x30mm, xl=9x2mm |
| Description: |
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| Viewed: |
64217 Time(s) |
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| Mineral: | Beryl (variety emerald), Calcite, Pyrite |
| Locality: | | La Pita mining district, Cunas Mine, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 26x17x30mm, xl=9x2mm |
| Description: |
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| Viewed: |
64150 Time(s) |
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| Mineral: | Beryl (variety emerald), Calcite, Pyrite |
| Locality: | | La Pita mining district, Cunas Mine, Municipio Maripí, Western Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 26x17x30mm, xl=9x2mm |
| Description: |
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| Viewed: |
64192 Time(s) |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 944
Location: Paris Area
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| Posted: Jul 21, 2015 16:23 Post subject: Re: Collection of Fiebre Verde - Chivor (#553) |
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Another little jewel from the El Oriente mine in the Chivor district.
| Mineral: | Beryl (variety emerald), Calcite, Pyrite |
| Locality: | | Chivor mining district, El Oriente Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | xl=12x6mm |
| Description: |
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| Viewed: |
64008 Time(s) |
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| Mineral: | Beryl (variety emerald), Calcite, Pyrite |
| Locality: | | Chivor mining district, El Oriente Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | xl=12x6mm |
| Description: |
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| Viewed: |
64010 Time(s) |
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| Mineral: | Beryl (variety emerald), Calcite, Pyrite |
| Locality: | | Chivor mining district, El Oriente Mine, Municipio Chivor, Eastern Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | xl=12x6mm |
| Description: |
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| Viewed: |
64035 Time(s) |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 944
Location: Paris Area
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| Posted: Jul 23, 2015 05:04 Post subject: Re: Collection of Fiebre Verde - Muzo with rock crystal (#554) |
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The emerald - colorless transparent quartz association is more commonly found in Peñas Blancas than in Muzo.
White calcite is also visible on the opposite side of the emerald aggregate.
Host rock is black shale.
| Mineral: | Beryl (variety emerald), Calcite, Quartz |
| Locality: | | Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 53x39mm, xl=25x23mm |
| Description: |
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| Viewed: |
64017 Time(s) |
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| Mineral: | Beryl (variety emerald), Calcite, Quartz |
| Locality: | | Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 53x39mm, xl=25x23mm |
| Description: |
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| Viewed: |
63956 Time(s) |
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| Mineral: | Beryl (variety emerald), Calcite, Quartz |
| Locality: | | Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 53x39mm, xl=25x23mm |
| Description: |
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| Viewed: |
63986 Time(s) |
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| Mineral: | Beryl (variety emerald), Calcite, Quartz |
| Locality: | | Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 53x39mm, xl=25x23mm |
| Description: |
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| Viewed: |
63980 Time(s) |
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| Mineral: | Beryl (variety emerald), Calcite, Quartz |
| Locality: | | Muzo mining district, Western Emerald Belt, Boyacá Department, Colombia | |
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| Dimensions: | 53x39mm, xl=25x23mm |
| Description: |
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| Viewed: |
63961 Time(s) |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 944
Location: Paris Area
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| Posted: Aug 04, 2015 16:53 Post subject: Re: Collection of Fiebre Verde - Muzo (#555) |
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Most of the fractures and internal cracks are perpendicular to the C-axis although some of them are parallel to it - see last image.
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: | 64x55x65mm, xl=27mm |
| Description: |
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| Viewed: |
63724 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: | 64x55x65mm, xl=27mm |
| Description: |
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| Viewed: |
63658 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: | 64x55x65mm, xl=27mm |
| Description: |
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| Viewed: |
63610 Time(s) |
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Pierre Joubert
Joined: 09 Mar 2012
Posts: 1605
Location: Western Cape
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| Posted: Aug 05, 2015 01:49 Post subject: Re: Collection of Fiebre Verde |
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Hi Gérard. Your specimens keep on amazing me. Please keep posting.
_________________
Pierre Joubert
'The tree of silence bears the fruit of peace. ' |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 944
Location: Paris Area
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| Posted: Aug 05, 2015 04:33 Post subject: Re: Collection of Fiebre Verde |
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| Pierre Joubert wrote: | | Hi Gérard. Your specimens keep on amazing me. Please keep posting. |
Hi Pierre - good to hear from you!
Thanks for your kind comments.
More specimens to come in association with your favorite mineral.
Gérard
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Pierre Joubert
Joined: 09 Mar 2012
Posts: 1605
Location: Western Cape
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| Posted: Aug 05, 2015 05:02 Post subject: Re: Collection of Fiebre Verde - Dioptase (#9100) |
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| Fiebre Verde wrote: | | Jordi Fabre wrote: |
Well, it seems glued. Very easy to check it, just submerge the specimen in Acetone.during 1-2 hours |
I was hoping not to hear this....
And if it is glued then I will lose the only "rock" my father left me :-(
(unless I glue everything back together of course).
I feel am engaged in a risky hobby more than ever. |
Hi Gerard. The orientation and irregularity of the dioptase crystals do look a bit unusual. You have a choice: dip it as Jordi suggested, or keep it with a question mark.
_________________
Pierre Joubert
'The tree of silence bears the fruit of peace. ' |
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Fiebre Verde
Joined: 11 Sep 2013
Posts: 944
Location: Paris Area
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| Posted: Aug 05, 2015 05:34 Post subject: Re: Collection of Fiebre Verde - Dioptase (#9100) |
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| Pierre Joubert wrote: | | Fiebre Verde wrote: | | Jordi Fabre wrote: |
Well, it seems glued. Very easy to check it, just submerge the specimen in Acetone.during 1-2 hours |
I was hoping not to hear this....
And if it is glued then I will lose the only "rock" my father left me :-(
(unless I glue everything back together of course).
I feel am engaged in a risky hobby more than ever. |
Hi Gerard. The orientation and irregularity of the dioptase crystals do look a bit unusual. You have a choice: dip it as Jordi suggested, or keep it with a question mark. |
Thanks for your remarks Pierre.
Should it be a glued specimen, it's a bit too late to tell my dad, from whom I inherited this vivid green... artistic object.
Will just keep it with a question mark along with my "too nice to be true" group of specimens.
Gérard
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