Please, identify the stone.

[Ain]

Hello. Could you please help me to identify the stone? The weight is much-much bigger then the stones of same size. It is more then 10cm long. Thank you!
Here are the pictures:

 

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[Ain]

I split off one small metal piece (about 1cm) with the hammer, and made an experiment with it. One side of piece was polished with sandpaper, than I put it to the acid HNO3(36%) for 3 min. Some black dots appeared on the polished surface and a very interesting structure. Unfortunately my camera doesn't have good macro mode, so it couldn't show all beauty of pattern on this small piece of iron. What do you think about it?

 

[Art_Blade]

You should always write about physical parameters like magnetism, mass, is metallic etc. But for me it doesn't look like a meteorite. No regmaglypts, inside are visible pores.

 

[ali1]

A piece of bone is fossilized to a living organism .. Maybe a dinosaur (organic)