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Collection of Bergur E. Sigurdarson
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Fiebre Verde




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PostPosted: Jul 02, 2020 15:59    Post subject: Re: Collection of Bergur E. Sigurdarson  

Bergur_E_Sigurdarson wrote:

Not perfectly sure about the composition of the matrix, but seems to mostly be some deteriorated carbonates (calcite and/or dolomite?) and on the back there is an eroded pyrite crystal.


In Gachalá, Euclase is found in lower cretaceous sedimentary rocks predominantly affected by chemical weathering.
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Bergur_E_Sigurdarson




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PostPosted: Jul 04, 2020 16:53    Post subject: Collection of Bergur E. Sigurdarson  

Small but perfect little Emerald sitting on "wings" of Calcite... I called it the butterfly... but maybe it's so small, that just fly would be more appropriate :-)


esmeralda-la-mariposa-calcite-penas-blancas.jpg
 Mineral: Emerald, Calcite
 Locality:
Peñas Blancas Mine, Municipio San Pablo de Borbur, Western Emerald Belt, Boyacá Department, Colombia
 Dimensions: 11 x 15 x 9 mm (HxWxD)
 Description:
Emerald xl 9,5 x 4 x 4 mm (HxWxD)
 Viewed:  710 Time(s)

esmeralda-la-mariposa-calcite-penas-blancas.jpg


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Bergur_E_Sigurdarson




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PostPosted: Jul 09, 2020 11:29    Post subject: Collection of Bergur E. Sigurdarson  

Before the lockdown I had to leave Colombia for a few days and went for a quick weekend hop to Lima, Peru. I used the opportunity to get some specimens from there.

Didn't have much time to prepare, find out where it would be best to buy and was feeling a bit underwhelmed by the offerings I saw (possibly because I wasn't in the "right" places and had little time). But upon my return and going through Peruvian material on the internet I'm a lot more pleased with what I got.

Here are some of the pieces, just in the order that I've been taking pictures.

As those were all purchased in Lima, I can only rely on their locality being what I was told (though I have scoured Mindat to verify that similar material is coming from those localities).



flurite-manganoan-calcite-dolo-pyrite.jpg
 Mineral: Fluorite, Calcite (var. Manganoan), Pyrite
 Locality:
Huanzala Mine, Huallanca District, Dos de Mayo Province, Huánuco Department, Peru
 Dimensions: 13 x 5 x 7 cm
 Description:
The shapes of the Calcite suggest they are growing after something, as they form "casts"
 Viewed:  611 Time(s)

flurite-manganoan-calcite-dolo-pyrite.jpg



axinite.jpg
 Mineral: Axinite-(Mn), Quartz
 Locality:
Cullhuay, Huaros District, Canta Province, Lima Department, Peru
 Dimensions: 6,5 x 5,6 x 5,2 cm
 Description:
See https://www.mindat.org/3WL-3WF for locality and similar specimen.
My specimen also has those slender included quartzes, just on the back
 Viewed:  608 Time(s)

axinite.jpg



large-epidote.jpg
 Mineral: Epidote
 Locality:
Pampa Blanca, Ticrapo District, Castrovirreyna Province, Huancavelica Department, Peru
 Dimensions: 7,9 x 5,9 x 4,3 cm
 Description:
 Viewed:  612 Time(s)

large-epidote.jpg



calcite-chalco-galena-pyrite.jpg
 Mineral: Calcite, Chalcopyrite, Galena, Pyrite
 Locality:
Peru
 Dimensions: 8,3 x 6,9 x 4,2 cm
 Description:
Don't remember locality I was told for this one and haven't found similar looking material, any help appreciated
 Viewed:  611 Time(s)

calcite-chalco-galena-pyrite.jpg



peru-pink-fluorite-green-core-web.jpg
 Mineral: Fluorite
 Locality:
Huanzala Mine, Huallanca District, Dos de Mayo Province, Huánuco Department, Peru
 Dimensions: 6,1 x 4,6 x 3,5
 Description:
Nice pink with a light-green core
 Viewed:  611 Time(s)

peru-pink-fluorite-green-core-web.jpg



Tetrahedrite-peru-web.jpg
 Mineral: Tetrahedrite, Quartz
 Locality:
Mina Casapalca, Casapalca, Huarochiri Province, Lima Department, Peru
 Dimensions: 6,0 x 3,5 x 1,8 cm
 Description:
Large xl 3,4 cm on edge
 Viewed:  609 Time(s)

Tetrahedrite-peru-web.jpg



quartz-mint-green-fluorite-peru-web.jpg
 Mineral: Fluorite, Quartz, Mica
 Locality:
Pasto Bueno District, Pallasca Province, Ancash Department, Peru
 Dimensions: 4,4 x 4,3 x 3,3 cm
 Description:
 Viewed:  608 Time(s)

quartz-mint-green-fluorite-peru-web.jpg


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Bergur_E_Sigurdarson




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PostPosted: Jul 10, 2020 14:54    Post subject: Collection of Bergur E. Sigurdarson  

The biggest microcline feldspar I've ever found myself, and I believe it's a manebach-twin, tho parts of it are missing.
I wasn't fortunate enough to find the pocket came from (I was just going through loose material, probably tailings from the old prospect), but expect it had some very nice things in it.

I was allowed onto the property next to the Little three mine near San Diego where I stumbled across this piece and a couple of small quartzes and even parts of the orange spessartine garnets the area is known for.
Judging by mindat, the property is located where the "Cable mine" used to be.
https://www.mindat.org/loc-91172.html

The owners showed me a huge ~25cm tall piece of quartz they'd found when digging some foundations, my little quartzes are just a couple of cm.



microcline-feldspar-CA-by-Little3.jpg
 Mineral: Microcline (Feldspar Group)
 Locality:
Little Three Mine area, Ramona, Ramona District, San Diego County, California, USA
 Dimensions: ~10 x 11 x 5 cm
 Description:
Not actually from Little three... but just west of it, see link to mindat location in description.
 Viewed:  515 Time(s)

microcline-feldspar-CA-by-Little3.jpg


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