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Shiny metallic rock?
  
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p2k




Joined: 15 Jun 2009
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PostPosted: Jun 15, 2009 16:18    Post subject: Shiny metallic rock?  

Okay, I've had this rock for well over 5 years. My father's friend gave it to me and claimed he found it outside his home. I have yet to identify it, and haven't found anything matching it through countless image searches.

I really hope someone here can help me identify this rock, it would be greatly appreciated.

Some things about it:

-Greyish-blue colour
-Shiny/Metallic
-NON magnetic
-Slightly melted on one side

Here's some pics:



PICT0539.JPG
 Description:
5
 Viewed:  60329 Time(s)

PICT0539.JPG



PICT0533.JPG
 Description:
4
 Viewed:  60309 Time(s)

PICT0533.JPG



PICT0532.JPG
 Description:
3
 Viewed:  60284 Time(s)

PICT0532.JPG



PICT0531.JPG
 Description:
2
 Viewed:  60295 Time(s)

PICT0531.JPG



PICT0524.JPG
 Description:
1
 Viewed:  60458 Time(s)

PICT0524.JPG


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Les Presmyk




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PostPosted: Jun 15, 2009 16:27    Post subject: Re: Shiny metallic rock?  

Will you knife scratch it? It looks somewhat like bornite. Where did you grow up?
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p2k




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PostPosted: Jun 15, 2009 16:36    Post subject: Re: Shiny metallic rock?  

It was found in Ontario, Canada. I tried scratching it and it was very difficult. It's really hard. But from what I can tell the inside remains the same metallic look as the outside.

A couple images I saw on google of Bornite did resemble this quite a bit though. That's probably what it is. Thanks.

But if anyone else has any ideas besides this go right ahead and say it.
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gemlover




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PostPosted: Jun 15, 2009 16:48    Post subject: Re: Shiny metallic rock?  

Galena?
Hematite?
Manganite?
Sphalerite?
Arsenopyrite?

Need properties of the sample:
hardness
Specific Gravity
Streak
Cleavage/fracture type

John

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p2k




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PostPosted: Jun 15, 2009 17:13    Post subject: Re: Shiny metallic rock?  

Well, I guess the hardness can be determined. I tried scratching it with a knife. Both the knife AND the sample received scratches.

I then attempted to break off a small piece using a hammer, i gave up as i didn't want to end up smashing the whole sample. I did end up hitting the side a few times though, and a chalky metallic dust came off. When i touched it with my thumb, the dust rubbed onto my thumb. It was a dark colour. Nearly black. So I guess that helps determine the streak.

As for the gravity, how would i determine that? The mineral DOES feel quite heavy, especially for it's size.

Also, I don't think I can determine the cleavage without breaking it. Unless it could be determined simply by looking at the pictures. I'm not exactly sure, I haven't tried identifying rocks before.
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p2k




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PostPosted: Jun 15, 2009 17:57    Post subject: Re: Shiny metallic rock?  

I think I'll post some additional information if this helps.

Size: 8x5.5cm

There are small holes scattered across the rock.

In the picture labeled '4', you can notice that part of the mineral seems melted. It has a smooth texture opposed to the somewhat rough texture in the rest of the mineral.

I hope this information helps.. I'm just trying to provide as much information as possible so that someone can identify the sample.

I'm leaning towards Bornite right now, but I'm not completely sure.
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Les Presmyk




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PostPosted: Jun 15, 2009 18:02    Post subject: Re: Shiny metallic rock?  

Between the holes, the hardness and the melted appearance, it sounds like a smelter product to me.
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Mike P.




Joined: 27 Aug 2013
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PostPosted: Nov 02, 2013 21:06    Post subject: Re: Shiny metallic rock?  

It looks like the sample that I found-Chromine (3)+ Iron
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Joseph DOliveira




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PostPosted: Nov 02, 2013 22:42    Post subject: Re: Shiny metallic rock?  

p2k wrote:
It was found in Ontario, Canada. I tried scratching it and it was very difficult. It's really hard. But from what I can tell the inside remains the same metallic look as the outside.

A couple images I saw on google of Bornite did resemble this quite a bit though. That's probably what it is. Thanks.

But if anyone else has any ideas besides this go right ahead and say it.


Where in Ontario did it come from, if it is from the Sudbury area of Ontario it can be pyrrhotite which is a silver, bronze, brown colour and quite hard, if it is chalcopyrite it should be a metallic brassy green and should be friable, the bornite from these parts is definitely deep blue in colour and also friable but is actually brown when freshly cut. It is quite possible that it may be a nickel matte which is a smelter product from this area.

Hope this helps.

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Joaquin Montoro




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PostPosted: Nov 03, 2013 02:58    Post subject: Re: Shiny metallic rock?  

I think it's only speiss, a smelting product containing essentially iron arsenide.
As other times, hard, heavy and silvery bright, so not a mineral but a man made slag.

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Mark Ost




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PostPosted: Nov 03, 2013 05:11    Post subject: Re: Shiny metallic rock?  

Looks a lot like specular hematite. Does it streak red?
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John Jaszczak




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PostPosted: Nov 07, 2013 11:45    Post subject: Re: Shiny metallic rock?  

Another possibility is (synthetic) silicon.
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