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This 'chunk' is almost a metre in length. Check the link above for a deep dive. :)Good question @edgarsart The rock that fell to earth was indeed much larger but had been used for millennia by people for making tools. It contains many elements.

wow from the photo it looked like it would be small piece

It's a pretty huge hunk of many metals and other elements.
This is what is left of a much larger object. It must have made a huge crater on impact.