What kind of rock is this?

When I was a little kid I found this in my backyard lying in the grass and was always sort of unsure what type of rock or mineral it was. It's extremely smooth all over and is the size of a regular rock you would skip across a lake. Any help would be appreciated.What kind of rock is this?


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What Girls Said 1

  • Looks like coal. Sedimentary rock.

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What Guys Said 1

  • That looks like a glob of asphalt with gravel in it that has been worn smooth.

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