We use cookies to show content based on your preferences. If you continue to browse you accept their use and installation. More information. >

FMF - Friends of Minerals Forum, discussion and message board
The place to share your mineralogical experiences

FMF English Forum is moderated by John S. White and Peter Megaw
 

Spanish message board






Newest topics and users posts
21 Feb-22:26:53 Re: the joy of tucson, 2020 gail spann experience (Gail)
21 Feb-22:16:51 Re: the joy of tucson, 2020 gail spann experience (Gail)
21 Feb-15:43:14 Re: building a great mineral collection? (Basti)
21 Feb-15:14:52 Re: unidentified green crystal (Pete Modreski)
21 Feb-15:14:48 Re: celestine (Bob Harman)
21 Feb-15:09:46 Re: unidentified green crystal (Alfredo)
21 Feb-14:50:30 Celestine (Stefan Koch)
21 Feb-14:40:58 Re: collection of sante celiberti - a mineralogical trip through italy (Sante Celiberti)
21 Feb-14:16:12 Re: unidentified green crystal (Mkomishyn)
21 Feb-13:56:56 Re: la morita mine (Peter Megaw)
21 Feb-13:50:54 La morita mine (John Betts)
21 Feb-10:24:10 Re: collection of firmo espinar (Firmo Espinar)
21 Feb-10:21:12 Re: tucson show 2020 (Bob Harman)
21 Feb-01:27:20 Re: the state of modern geology (Matt_zukowski)
21 Feb-00:20:32 Re: the state of modern geology (Peter Lemkin)
20 Feb-23:01:19 Re: building a great mineral collection? (Bob Morgan)
20 Feb-22:17:49 Re: don lum collection (Don Lum)
20 Feb-19:08:12 Re: the state of modern geology (Marvinlewinsky)
20 Feb-18:24:17 The mizunaka collection - quartz (Am Mizunaka)
20 Feb-17:33:19 Re: the state of modern geology (Peter Megaw)
20 Feb-15:31:42 Re: collection of sante celiberti - a mineralogical trip through italy (Sante Celiberti)
20 Feb-11:21:43 Re: building a great mineral collection? (David Dinsmore)
20 Feb-09:09:06 Re: building a great mineral collection? (Peter Lemkin)
20 Feb-08:39:55 Re: building a great mineral collection? (Rob Schnerr)
20 Feb-07:47:33 Re: building a great mineral collection? (Tobi)

For lists of newest topics and postings click here


RSS RSS

View unanswered posts

Why and how to register

Index Index
 FAQFAQ RegisterRegister  Log inLog in
 {Forgotten your password?}Forgotten your password?  

Like
63203


The time now is Feb 22, 2020 08:45

Search for a textSearch for a text   

A general guide for using the Forum with some rules and tips
Collection of Bergur E. Sigurdarson
  Goto page Previous  1, 2
  Index -> Collection photos and Collector's page
Like
137


View previous topic :: View next topic  
Author Message

Fiebre Verde




Joined: 11 Sep 2013
Posts: 866
Location: Paris Area


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Mar 15, 2019 09:47    Post subject: Re: Collection of Bergur E. Sigurdarson  

Hi Bergur,
So the mystery is cracked!
There are several references describing the presence of "pearly white" allophane in both emerald belts formed as a result of alteration of albite.
Good find!
Gérard
Back to top
Reply to topic Reply with quote
Like
2
   

Bergur_E_Sigurdarson




Joined: 21 Dec 2017
Posts: 92
Location: Paipa, Colombia


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Mar 20, 2019 11:48    Post subject: Re: Collection of Bergur E. Sigurdarson  

Some more recent additions to my collection.

A couple of months ago I found a small piece of shale matrix with some calcite and micro-quartz as well as .... faintly blue fluorites.
Being sold by one of the outside dealers on the little plaza in Bogota. He wasn't sure where it was from... but just looking at the piece I was almost sure it was Colombian.
I just had never heard of blue fluorite here.

Then later I went on a trip to the western emerald belt and in Santa Barbara, the little village north of Coscuez, a collector had a few loose pieces of blue fluorite on display. He very generously gave me one... a very complete crystal, tho without matrix.
He was very sure of it's origin, Florian, Santander.

The last of the little blues I have now is very faint, possibly from exposure to light.
Again a street vendor in Bogota, so no location, and sadly no matrix (I'm still quite convinced it's Colombian)

On my trip to the western belt I also spoke to a collector and vendor in Muzo who has a stake in a mine in Peñas Blancas (the one I spent a whole day inside) who told me that very occationally they did find blueish fluorites up there.

I have now seen not just the typical transparent with green stripe fluorites here, but a few slightly pink, some still with the green strip near the corners. A very damaged piece I could not buy that was quite intensely pink. The light blues as well as some really nice little very clear and gemmy ones.
Looking forward to exploring what else is hidden in this country :-)



fluo-azul-01.jpg
 Mineral: Fluorite, Calcite, Quartz
 Locality:
Colombia
 Dimensions: 49x44x23mm
 Description:
Largest XL appx 6mm each side
 Viewed:  1303 Time(s)

fluo-azul-01.jpg



fluo-azul-02.jpg
 Mineral: Fluorite
 Locality:
Colombia
 Dimensions: 17x17x13mm
 Description:
Florian, Santander, Colombia
 Viewed:  1306 Time(s)

fluo-azul-02.jpg



fluo-azul-03.jpg
 Mineral: Fluorite
 Locality:
Colombia
 Dimensions: 30x22x24mm
 Description:
 Viewed:  1305 Time(s)

fluo-azul-03.jpg


Back to top
Reply to topic Reply with quote
Like
7
   

Bergur_E_Sigurdarson




Joined: 21 Dec 2017
Posts: 92
Location: Paipa, Colombia


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Mar 20, 2019 17:38    Post subject: Re: Collection of Bergur E. Sigurdarson  

Having browsed through most of the Colombian information available on Mindat, I've become more and more interested in getting specimens of what comes out of this country.

This is one of the most recent, a light blue sapphire.

Of the very few found here, most are very damaged by river tumbling and have a satin finish. But occationally some shinier ones are found. Not sure if it's from looking further up the river area or what.

The area might have quite a bit of corundum but the main reason, it seems, for so little material to come out of it, is that there are still guerrilla and autodefensas fighting there.



sapphire-01.jpg
 Mineral: Corundum (variety sapphire)
 Locality:
Mayo River, Municipio Mercaderes, Sur Province, Cauca Department, Colombia
 Dimensions: 5x6x3mm
 Description:
Slight damages on edges and one sadly been sanded lightly by a former owner, possibly in preparation for cutting.
 Viewed:  1227 Time(s)

sapphire-01.jpg


Back to top
Reply to topic Reply with quote
Like
7
   

Bergur_E_Sigurdarson




Joined: 21 Dec 2017
Posts: 92
Location: Paipa, Colombia


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Dec 23, 2019 16:27    Post subject: Collection of Bergur E. Sigurdarson  

I'm back in Colombia... since the beginning of December.
Might be staying for quite some while this trip.

Already got a few nice new pieces and have my camera with me.

First off, here is an awesome elongated and twisted quartz crystal with side-growths that are almost missing two sides of the usual hexagonal shape, from Boyaca.
(most likely in the area close to Peñas Blancas... even possibly across into Santander as it's quite close by - exact locality not given by seller, Inocencio Nuñes of Muzo)



quarzo-elongado-2.jpg
 Mineral: Quartz
 Locality:
Boyacá Department, Colombia
 Dimensions: 17,2 x 4,9 x 3,8 cm
 Description:
 Viewed:  593 Time(s)

quarzo-elongado-2.jpg


Back to top
Reply to topic Reply with quote
Like
8
   

Bergur_E_Sigurdarson




Joined: 21 Dec 2017
Posts: 92
Location: Paipa, Colombia


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Dec 23, 2019 16:42    Post subject: Collection of Bergur E. Sigurdarson  

Although I have seen pieces of greenish Calcite here in Colombia, they have not been in the classic shape.
Most have been incomplete and of a more grassy green hue and with no sign of matrix.

Recently I've seen a few that are attributed to a mine "near Otanche"
...they are clearly coming from veins in black shale and some have a bit attached to their backs, and some are nicely twinned in some way.

I wonder if they are from the Ormicol, that is situated just by the entrance to Otanche, where early this year some nice Siderite/Dolomite/Quartz/micro-Pyrite combos (and even a bit of Sphalerite) came out of?

Here are two of my samples of this "new" greenish Calcite (almost blue-green hue)



calcita-azul-verdoso.jpg
 Mineral: Calcite
 Locality:
Otanche, Occidente Province, Antioquia Department, Colombia
 Dimensions: 10,2 x 6,9 x 1,8 cm
 Description:
 Viewed:  593 Time(s)

calcita-azul-verdoso.jpg



calcita-verdoso.jpg
 Mineral: Calcite
 Locality:
Otanche, Occidente Province, Antioquia Department, Colombia
 Dimensions: 3,8 x 2,4 x 2,4 cm
 Description:
 Viewed:  589 Time(s)

calcita-verdoso.jpg


Back to top
Reply to topic Reply with quote
Like
10
   

Bergur_E_Sigurdarson




Joined: 21 Dec 2017
Posts: 92
Location: Paipa, Colombia


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Jan 20, 2020 17:52    Post subject: Re: Collection of Bergur E. Sigurdarson  

I got this large quartz a couple of weeks ago, it has some damage (which is common here, especially when from the street sellers).
It has micro-inclusions of epidote and although an exact locality is missing, I do know it comes from Cauca-department.
The whole crystal is milky, but in a greenish-blue colour and because of it's size I'm not too bothered by the slight damage.



Cuarzo-azul-verdoso-con-epidota.jpg
 Mineral: Quartz, Epidote
 Locality:
Cauca Department, Colombia
 Dimensions: 17,6 x 7,4 x 5,6 cm
 Description:
 Viewed:  338 Time(s)

Cuarzo-azul-verdoso-con-epidota.jpg



Cuarzo-azul-verdoso-con-epidota-detail.jpg
 Mineral: Quartz, Epidote
 Locality:
Cauca Department, Colombia
 Dimensions: 17,6 x 7,4 x 5,6 cm
 Description:
Macro of Epidotes inside the crystal. No more than 2mm at most.
 Viewed:  336 Time(s)

Cuarzo-azul-verdoso-con-epidota-detail.jpg


Back to top
Reply to topic Reply with quote
Like
8
   

Tobi




Joined: 07 Apr 2009
Posts: 3186
Location: Good Old Germany


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Jan 21, 2020 03:29    Post subject: Re: Collection of Bergur E. Sigurdarson  

Very impressive quartz with wonderful inclusions, I really like it :-)
Back to top
Reply to topic Reply with quote
Like
1
   
Display posts from previous:   
   Index -> Collection photos and Collector's page   All times are GMT - 5 Hours
Page 2 of 2
  Goto page Previous  1, 2  

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


All pictures, text, design © Forum FMF 2006-2020


Powered by FMF