FMF - Friends of Minerals Forum, discussion and message board

Roger Warin · Joined: 23 Jan 2013 Posts: 1232

It really is as.
Roger.

valere · Joined: 10 Feb 2011 Posts: 55 Location: Belgium

Pure Eye Candy!
The color of this one is incredible
Thanks Roger!

Tobi · Posted: Mar 06, 2013 12:13 Post subject: Re: Mashamba minerals

Really a nice one, Roger!

Maxilos · Posted: Mar 07, 2013 08:17 Post subject: Re: Mashamba minerals

Hello,

What a lovely deep red cuprite crystal. Great!

Mark

Nico78 · Joined: 31 Oct 2012 Posts: 34 Location: Paris

One of my first contibutions of this forum with some pieces!

Nico78 · Joined: 31 Oct 2012 Posts: 34 Location: Paris

followed by...

Jordi Fabre · Posted: Mar 30, 2013 16:45 Post subject: Re: Mashamba minerals

Roger Warin · Joined: 23 Jan 2013 Posts: 1232

Hello,
I think these carrollites are from Kasundwa mine, South Kamoya, Kambove (DRC).
Roger.

Nico78 · Joined: 31 Oct 2012 Posts: 34 Location: Paris

Sorry!
Beginer's mistakes to forget the size :x
For the first one, I lets you guess with the size of my hitch.
For the second 4*5 cm.

And thanks Roger for this precision.
But in the other hand this pieces came from an old collecion of a french geologist that worked in Congo in the 70"s. SO I can really tell you it's it is a mistakes of location in the etiket or not...

Roger Warin · Joined: 23 Jan 2013 Posts: 1232

Hello,
Is this French geologist GG?
The carrollite was not an abundant mineral in DRC. Buttgenbach analyzed it from a small sample from Luishia (Katanga) (1925).
In the late 80s beautiful crystallized samples (but <1 cm) of carrollite with bornite xls were found in Kamoto-Pit. Morphology is more complex (and also beautiful) than in Kasundwa mine (Kamoya).
At Kambove, crystals of carrollite can reach 2 cm.
Latest discoveries of carrollite from Kasundwa mine have less rich forms (octahedron, cuboctahedron, cube), but they may exceed 5 cm edge and they’re spectacular.
Carrollite with linnaeite is rather a component of the primary ores of cobalt. Well crystallized it seems rare.
I think no carrollite specimen was found in Mashamba.
Roger.
PS: if you want see a map of copper crescent mines in Katanga, you can see this link:
https://www.agab.be/mineralogie/Katanga/cartes.html
(link normalized by FMF)

Jordi Fabre · Posted: Apr 01, 2013 09:32 Post subject: Re: Mashamba minerals

Tracy · Joined: 15 Sep 2006 Posts: 551 Location: Toronto

Hi Nico78 -

As Jordi says, but also, when you say "the size of my hitch" do you mean your thumb? It is barely visible in the photo and can be a variety of sizes. A rough estimate is possible based on the box on which the carrolite is mounted (relative to your fingers), but actual numbers would be much better.

Thanks

- Tracy

supertxango · Joined: 15 Jul 2012 Posts: 135 Location: Madrid

Hi Nico78,

Please, as Tracy and Jordi say we need the dimensions in the following way:

A x B x C cm or A x B x C mm.

Thank you very much.

GneissWare · Joined: 07 Mar 2008 Posts: 1287 Location: California

Nico78 · Joined: 31 Oct 2012 Posts: 34 Location: Paris

Yes in fact, the specimens came from Gilbert Gauthier collection.
And really sorry for my lack of accurancy.
However I can't give you more precisions for the moment!
I am working in New Zealand and my collection still in Paris.
I have just some pictures here to give me some good memories and to participate a little to this forum.
Thanks, and again sorry,

(and yes 4*5cm means 4cm x 5cm)

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