This is a list of known locations on the Gem Homeworld.
Homeworld is home to a highly advanced city. Skyscrapers can be seen with thin white tubes connecting each other. Lights of different colors can be seen travelling through these tubes. There are also white pedestals with red inverted triangles on top. At the bottom of one of the skyscrapers are cell-like structures, very similar to the cells inside of the Gem Warship. There is a white flower-like mechanism in the city attached to an anvil and a circular black smokestack on top, looking identical in design to the Roaming Eye ships. In the distance, green tubes can be seen connecting to triangular structures, and there are also black inverted pyramids which are identical to the Pyramid Temple on Earth. A large structure built in the shape of the Unknown White Diamond can also be seen in the distance.
- Docking Bay - There is a building inside of the city with a lime green interior. Gems enter the docking bay to park and exit their ships.
- Trial Building - While it is unknown if the trial building is the same building as the docking bay, it is also located in this city. There is an empty pink room that connects to a trial room, where court cases take place. The exterior of the building is black.
- Excavation Site - Below the trial building is a large, gaping hole in the ground. It is surrounded by walls of different shapes, taking on strange appearances compared to structures on Earth. Notable wall designs have a similar appearance to cheese graters.
At the bottom of the Excavation Site is an abandoned area of Homeworld. Being partially underground, the area receives little light, and is very dark. The area is barren, covered in dirt and rock. Many tree-like shapes connect the walls together closer to the ground. Pedestals protrude from the ground, and old statues of Gems and fusions can be seen scattered around. Some pedestals have text on them written in the Gem Language. There is another hole in the ground that leads to an abandoned Kindergarten facility.
- Abandoned Kindergarten - Going through another hole in the ground leads to a dark cave. At the end of the cave is a humongous Kindergarten, with holes scattered everywhere that are seemingly endless. Going through a hole in a wall leads to another part of the Kindergarten, where the Off-Colored Gems live. This Kindergarten is completely underground.
Yellow Diamond's Control Room
Not much is known about Yellow Diamond's control room, aside from the fact that it appears to be in space, and near or inside of an asteroid field.
In "Message Received", Yellow Diamond is seen in the control room using holographic terminals to access information quickly. These terminals presumably possess the same functionality as the Moon Base terminals.
It is similar in style and technology to the Moon Base, though they are not identical.
Only a white floating chair atop a stepped diamond-shaped altar can be seen from the inside, seemingly where Yellow Diamond works. There is a large glass wall made up of triangular panels separating the control room from the outside where several asteroids float in space both near and far.