To purchase the equipment in Quests, players should first collect a sufficient number of colorful gems - pink, blue and yellow.

Colorful gems can be obtained in various ways:
1) open the Puzzle Boxes (Multi-Colored, Green and Bonus Boxes (Brown));
2) earn them from repeated Puzzle Pieces (if you receive a Puzzle Piece that you already have, it's converted to gems. But the gems will always be the same color as the duplicated puzzle).
All gems are saved till the following Quests; they aren't removed. So if you don't have enough gems to purchase some equipment, don't worry, they can be spent in the next Quests 😊