A greater teleport focus can be built in the Centrepiece space of the Portal Chamber in a player-owned house. It requires 65 Construction to build and when built, it gives 500 experience.
It is the second centrepiece able to be built in the Portal Chamber, the first being the teleport focus, and the third being the Scrying pool.
The centrepiece resembles a marble square with a floating, translucent purple book above it, with a glowing star orbiting it.
Aside from appearance, there is no difference between this and the teleport focus. Thus, it is not recommended to build this unless the player really wants the different design, as marble blocks are expensive to obtain.
When creating your teleports, location 1 is the portal to the left of the door when walking into the portal chamber. Location 2 is directly opposite of the door. Location 3 is the portal to the right of the door when walking into the portal chamber.