Can anyone identify this please?

[Alienizer]

I found this rock and managed to break it in half. It is black on the exterior but silver looking inside with some speckles of what looks like fool's gold. It is very heavy for a rock, twice as heavy. It weight 900g and I have it exposed to the element for 2 weeks now and it's not getting rusty or anything. I have an earth magnet attached to a 3 foot thread and when the rock gets to about 1 inch of the magnet, the magnet moves towards the rock and stick to it. So I imagine it's got a bit of iron? But the silvery thing, anyone knows what it could be? I took some picture, and hopefully this will help. Thanks for any help you can provide.

 

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[Paulripp]

Meteor?

 

[Eu_citzen]

Do a steak test. Rub it against an unglazed piece of porcelain. What colour do you get?

 

[Alienizer]

Do a steak test. Rub it against an unglazed piece of porcelain. What colour do you get?

Using the silver side only, if I don't press hard, nothing, if I press very hard, it's a little black, dark grey?, but not much. Here is a huge picture of the streak test...

Thanks for helping!

 

[mouseman]

Looks like basalt, with iron oxides and minerals which makes the rock have color.

 

[Alienizer]

Looks like basalt, with iron oxides and minerals which makes the rock have color.

Are you sure? If it has iron, wouldn't a magnet get stuck to it? Wouldn't it oxidize? because it doesn't!

I shaved a corner of it on a grinder, and 99% of it is silver looking, with a few specks of colored minerals.

 

[Brian T. Booth]

I found this rock and managed to break it in half. It is black on the exterior but silver looking inside with some speckles of what looks like fool's gold. It is very heavy for a rock, twice as heavy. It weight 900g and I have it exposed to the element for 2 weeks now and it's not getting rusty or anything. I have an earth magnet attached to a 3 foot thread and when the rock gets to about 1 inch of the magnet, the magnet moves towards the rock and stick to it. So I imagine it's got a bit of iron? But the silvery thing, anyone knows what it could be? I took some picture, and hopefully this will help. Thanks for any help you can provide.

<img src="http://www.treasurenet.com/forums/attachment.php?attachmentid=871671"/>

<img src="http://www.treasurenet.com/forums/attachment.php?attachmentid=871672"/>

<img src="http://www.treasurenet.com/forums/attachment.php?attachmentid=871673"/>

I think it's a Phyllite with pyrite or chalcopyrite. That would explain the silver look. Image below.