Dimension Diamond
Dimensional item Magic crystal needed when casting instant moving magic. If you collect them and bring them to the Gatekeeper, you can exchange them for various types of escape scrolls. Cannot be exchanged or dropped. Can be shared between characters within an account through the Dimensional Merchant. Can be stored in a private warehouse.
Not dropped by monsters.
Cannot be spoiled.
The chances are official (x1). On servers with x10, x100 and higher rates, drop and spoil come more often.