Gold Chest

The Gold Chest is a Storage item similar to the standard Chest, but typically have a larger sum of coins inside them - 75 silver coins in one is not uncommon. They also cannot be crafted.

If you remove every item from the chest, you can then use a Hammer to pick it up. They can be placed just like a standard Chest, and they have 20 slots of storage space (again, the same as a standard Chest).

As far as appearance goes, they are golden colored and have the same sparkle effect that pockets of ore do.

Trivia

 * Even when empty, Gold Chests are immune to all explosions.
 * Possible bug: Opening/closing a door near a Gold Chest may cause it to revert into a normal chest.
 * If your world was generated with the 1.0.5 or prior patch, then gold chests do not require gold keys to be opened.

http://www.youtube.com/watch?v=Ud0wCleFJqc