Jewel piece box

The Jewel Piece Box is an item in the game Wario Land 4. There are four Jewel Piece Boxes in each level. Each box contains a Jewel Piece and a Gold Coin worth 500 points. The Boxes bear the face of the Golden Diva. The player does not actually need to find all of the boxes to go to the next level but the player does need all of them to fight the area's boss.

Once Wario collects the Diamond Piece from the Box, only the Gold Coin will pop out if he revisits the level and opens the box again.