The quest is given by The Builder. This quest has only one part.
Good news! The Bounty Board is finally up and running again. Villagers will now post bounties each day asking you to do small tasks in exchanging for Stamps, that can be turned in for Diamonds. Diamonds! Imagine! Try it!
Great job! Remember, every time you collect 10 stamps, you get 5 Diamonds in exchange! That's a whole lot of Diamonds!