What kind of rock is this?

[treasurea1]

I found this unusual rock at a park near my house and I pulled a tiny iron ball outside of the rock with tweezers. What kind is it?

 

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[unclemac]

cant really see it

 

[galenrog]

Double posting the same question and pics in 25 minutes? Can a moderator please combine these threads, please?

Also, looks like a dark grey to black rock. Since you can actually see it in good light, with details in focus, can you tell us a little about it. Describe it. The color. How it does or does reflect or refract light. Texture. Visible crystalline structure. This would help.

 

[sutphin]

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