A powerful blow

Exploration Stage: Green Studio
From: Florian
Description: If I had known that what was in that box was that important, I would have told you all about it from the beginning! I just wanted to fix some gardening supplies. One of the items was an amber mallet. Can you find that for me?
Completed: According to Lady Rosemary, this amber mallet is what spring girls use to break ice on frozen rivers. What a surprise! I used it to fix my hoe. That's why it was so powerful.