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Identification Help (Native Bismuth)

Posted by Joe Mork  
Re: Identification Help (Native Bismuth)
July 22, 2012 07:14PM
Looks like Skutterudite to me!
avatar Re: Identification Help (Native Bismuth)
July 22, 2012 08:24PM
    
My first thought at seeing the pictures was galena.

-Rowan Lytle

Necessities:
Food, Water, Shelter, Fire, Minerals.
Re: Identification Help (Native Bismuth)
July 22, 2012 10:04PM
    
Also thought galena

Regards george
Re: Identification Help (Native Bismuth)
July 22, 2012 10:10PM
    
Seriously guys, Galena would never break like that ( has a perfect cubic cleavage) and the color is totally wrong. Check your mineralogy books!
avatar Re: Identification Help (Native Bismuth)
July 23, 2012 01:41AM
here's a big chunk of Bismuth for comparison... typical tarnish and all

http://i3.photobucket.com/albums/y62/auplater/Bismuth1.jpg

auplater
Re: Identification Help (Native Bismuth)
July 23, 2012 02:38AM
Thank you for the comparison photo. The stuff I have is definitely not Bismuth, but does in fact look like Skutterudite. The picture attached shows exactly what I see in the vugs as well. I will also attach a picture of the octrahedrenal crystals that come off.
Attachments:
open | download - 0507221001203856999.jpg (199.3 KB)
Re: Identification Help (Native Bismuth)
July 23, 2012 04:48AM
Does nobody ever consider testing with Occam's Razor in cases such as this?

Genuine natural native bismuth, unlabelled, unboxed, in a jar with agates and amber???

Add the fact that it looks NOTHING like either native or manmade bismuth... and I collected semi-metals for a while, have seen lots...
Re: Identification Help (Native Bismuth)
July 23, 2012 07:50AM
Peter was close when he said Bismuth has a yellowish color, i have seen many Native Bismuths from Wolfram Camp, North Queensland,
& i'd say Bismuth has a light brassy color like is shown with John's specimen.
Yes Bismuth does crystallize, i once saw a specimen in combo with Quartz in the Queensland Mines Dept collection in Brisbane, many years ago.
Re: Identification Help (Native Bismuth)
July 23, 2012 01:52PM
    
So the density was just fictional then?
Re: Identification Help (Native Bismuth)
July 23, 2012 02:52PM
No, the density on the largest piece was just as I said. I'm rerunning the entire test
Re: Identification Help (Native Bismuth)
July 23, 2012 05:40PM
    
If the SG isn't fictional than it can't be skutterudite. The Hardness is also off for skutterudite. I think it is a type metal alloy ( Pb,Sb,Sn).



Edited 1 time(s). Last edit at 07/23/2012 09:01PM by Reiner Mielke.
Re: Identification Help (Native Bismuth)
July 23, 2012 07:41PM
    
Edit: Comment no longer relevant.



Edited 1 time(s). Last edit at 07/27/2012 01:35PM by Evan Johnson.
Re: Identification Help (Native Bismuth)
July 26, 2012 01:51PM
Hi Mork, how are you and Mindy? winking smiley
Seriously, Joe, to me no man-made product of native elements (another morphology, generally more cleavaged), no crystallized natural Antimony or Bismuth (really in euhedral crystals too much rare), I see pentagonododecahedral crystals pale gray color with bluish iridescence on the surfaces and I'm thinking to the moroccoan Skutterudite. See you that
http://www.mindat.org/photo-41615.html
Before you come back on your test, there may be a link with moroccoan minerals? Maybe at the flea market there were other pieces, as Baryte, Vanadinite, Azurite / Malachite, Chalcedony, other Morocco material?

Simone Citon
Re: Identification Help (Native Bismuth)
July 27, 2012 07:14AM
hi , look man made to me but if it's natural could it be a kind of antimony minerals like senarmontite with bluish irisations of berthierite ?
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