what is this rock?

[vicke]

Hi i am new to this and yeasturday i was looking for silver and i thought i found it.
This is what i found and i am not sure anymore i am afraid it is arsenic?
Thanks in advance.

 

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[golden sluice]

Hello, welcome aboard! It looks like a slag metal of some type. 122.13 grams? Im not jumping to meteorite just yet but, try the ceramic scratch test. And if you've got a geiger counter that could help you determine what this is.

 

[vicke]

Hmm i have no geiger counter at the moment but i will try as many tests i can.
Thank you

 

[Buckshotnc]

Might help to know where you found it.

 

[vicke]

I found it on a island in östersjön in northern europe.
I did try to make a cloud chamber and did not se any sign of radioactivity:-)

 

[vicke]

The piece on 122,13g has a displacement of 34ml that shuld help?;-)
Thanks

 

[vicke]

I tryed to scratch it on things to get an idea of the hardnes and it scrathes steel regular glass and eaven flint silicon tungsten and titanium but not sapphire and leaves a black like dust on roughed alumina.

 

[Bajahunter]

vicke
If there is arsenic in it it will give off a garlic oder when you strike the two pieces togeather, like trying to create a spark with flint. If it does put in a well marked box and wash your hands.
It sounds like it has a hardness of 7.5 which would make it harder than the average arsenic bearing rock. Try your hardness test the other way around. See what leaves a scratch on your rock. The steel, glass, flint, and saphire are all you need to test with. Get a magnifying glass and look to see if there is a scratch or did the scratching device just leave a trail of powder.

 

[vicke]

It smells more like sulfur when hitting them to each other and i can add it is not magnetic.
Hard to see on the surface when it is so rough if it scratches but seems like flint alumina and sapphire scratches it but not steel or titanium.

 

[Eu_citzen]

Marcasite comes to mind.

 

[vicke]

Hmm... it seems like this is less dense and not realy looks like the pictures i find on it.

 

[Eu_citzen]

Very similar to pyrite, could also be pyrite, they are related. The hardness and streak fit making it the most likely candidate.

 

[vicke]

It might be i will do some mpre tests on it next week and see if i get a result.
Thank you all!

 

[vicke]

Isn't pyrite "fools gold" it does not at all look like gold it acualy lools kinda exactly like thw picturea i first added and the last 2 was on a combuter screen in rhe microscope. It has same colour as titanium.

 

[Eu_citzen]

Don't get to hung up on colour. Your streak and hardness test suggest that result. Tourmaline isn't always black, either.

 

[vicke]

True but i will try to analyse it to see what it realy is:-)

 

[vicke]

It is Hematit Fe2O3 but it is not from here so it must have come with the ice some thousand years ago:-)
Thanks all for your help:-)

 

[Eu_citzen]

Hematite would leave a reddish streak, not a black. Is that the result of the assay?

 

[vicke]

Yes it leaves a dark line red/brown i pulverized a little and it was red.