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Metal ore?
  
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Kara




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PostPosted: Aug 29, 2018 03:25    Post subject: Metal ore?  

Hello and sorry, me again. Found this rock yesterday, have never collected these rusty uglies but got interested because of the metallic stuff on top.

Very heavy, gives reddish brown streak to porcelain (some places give also dark grey streak), steel knife scratches through both the grey metallic mineral and the rusty looking host rock and both of them easily scratch copper coin. Not magnetic. I'll try to crack it to get a fresh surface view.

Could this be hematite or another iron ore? Thank You in advance! Kara



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Kara




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PostPosted: Aug 29, 2018 10:02    Post subject: Re: Metal ore?  

I managed to crack a piece off, and it looks like an ordinary ugly rock with some iron to me. What do you think?


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Riccardo Modanesi




Joined: 07 Nov 2011
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PostPosted: Aug 29, 2018 10:13    Post subject: Re: Metal ore?  

Hi to everybody!
Personal opinion: hematite, together with other minerals (quartz, pyrite, chalcopyrite...).
This mineralogical association is very common in our Elba Island!
Greetings from Italy by Riccardo.

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Hi! I'm a collector of minerals since 1973 and a gemmologist. On Summer I always visit mines and quarries all over Europe looking for minerals! Ok, there is time to tell you much much more! Greetings from Italy by Riccardo.
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alfredo
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PostPosted: Aug 29, 2018 10:33    Post subject: Re: Metal ore?  

I think almost certainly hematite.
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Peter Lemkin




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PostPosted: Aug 29, 2018 11:46    Post subject: Re: Metal ore?  

Hematite is Fe2O3 and quite common in many places. If you had found iron [Fe], that would be rare indeed!!!!!! [only a very few places on Earth have produced native Fe].....While there is a lot of iron within surface rocks, nearly all of it has been oxidized or chemically combined with other elements. If you have a really good magnifying glass, or better a stereoscopic microscope, you can examine a lot of the minerals you are finding better - and what is associated with them. The Russian stereoscopic mineralogical microscopes are not bad at all for the price and likely available online or at some place that sells to collectors. Just an idea if you are really interested in getting involved with minerals.

https://en.wikipedia.org/wiki/Hematite
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Firmo Espinar
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PostPosted: Aug 29, 2018 17:17    Post subject: Re: Metal ore?  

Hi Kara,

I think we can also see massive pyrite like I add.



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Colombia
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Kara




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PostPosted: Aug 30, 2018 00:28    Post subject: Re: Metal ore?  

How nice there is pyrite too, thank you Franjungle for the interesting picture. I have found only tiny scattered cubes before, had no idea they can be like this too.
Thank you all very much!



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