The Chest is found on every different level of the game. When opened, it can contain Small Gems, which look the same as normal gems but are smaller and worth less. The Chest can also contain a Live Bomb, and if the player is not in a good area the bomb could kill them.
The Big Chest is the locked chest found the Mines that contains the Udjat Eye. It requires a key, whih is always found on the same level. It looks the same as a Chest but with a golden lock on it.