An armillary sphere can be built in the globe space of the study in a player-owned house. It requires 77 Construction to build and when built, it gives 960 experience. The player must have a hammer and a saw in their inventory to build it.
Unlike the small orrery and large orrery, the armillary sphere does not move.
- Although it requires two gold leaves to build, there is no visible gold on it.
- Even though this piece of furniture cannot be made into a flatpack, the game cache reveals a flatpackable version of it (). This may be the result of Jagex deciding that these items should not be made flatpackable for unknown reasons, but did not remove the code for the items before launch.