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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

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

Regards george
avatar 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

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.
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
avatar 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
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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