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I found this rock while wet sifting dirt brought back from the Arkansas Crater of Diamonds. It looks as if it is hand painted.

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It is smaller than my pinky nail. It’s dull, and makes a chalk-like mark when rubbed on pavement.

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closed as off-topic by Jan Doggen, Friddy, trond hansen, Fred, arkaia Aug 31 at 2:11

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "Questions about rock identification requests are off-topic. For more information, see the announcement on meta." – Jan Doggen, Friddy, trond hansen, Fred, arkaia
If this question can be reworded to fit the rules in the help center, please edit the question.