The crystal spheres category is a category for pages in this wiki that include canon material about the celestial objects known as crystal spheres, if you are looking for the adventure module named after them see the SJA3 category.
The crystal spheres category should be attached to all articles about in-universe elements of Spelljammer that deal entirely, or in part, with crystal spheres.
It should be attached to all articles about named crystal spheres (i.e. Greyspace), but should not be directly attached to articles about things contained within that sphere (each specific crystal sphere should have its own child category).
The crystal spheres category can also be attached to articles that deal with generic things that are connected with crystal spheres. But it should not be attached to articles that suggest things are found only in specific crystal spheres if they do not mention general information about other crystal spheres. It should also not be attached to the SJA3 Crystal Spheres article or any other out-of-universe articles about novels or comics that feature crystal spheres.
This category has the following 4 subcategories, out of 4 total.