Jewel piece box

The Diamond Piece Box is an item in the game Wario Land 4. There are 4 Diamond Piece Boxes in each level they are usually hidden through out the level. Each box has a Diamond Piece and a Gold Coin in it. The Boxes look just like boxes with the Golden Divas face on them. A 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 boss.