A mahogany prize chest is the best crate that can be built in the Games room in a player-owned house.
The chest can hold up to any amount at a time. It can only be opened by a winner in the Games room (on a game set up by the house owner).
- When entering a bank pin at any bank across Gielinor, there is a picture of a Mahogany prize chest shown alongside the numbers.
- Before Jagex implemented the trade limit, players could put in up to 500k into the box, making a potential scam (by the owner kicking people out) or a high risk fun game. This was also to stop Real World Trading in a POH.