Diamond City is the main settlement presented on Homeworld, and where both Blue Diamond and Yellow Diamond reside in.
Layout[]
Diamond City is mainly a gigantic settlement for Gem kind, and the most prominent settlement presented in the series. Much of the city is made up of structures and buildings not only futuristic compared to Earth and Equus, but also far larger than many other areas seen. The city is so big, it's split into two main parts: Blue Diamond City, and Yellow Diamond City. Both cities are side-by-side, and each diamond respectively is in control of their respected city.
The city itself is built above the Supreme Kindergarten, some areas in both cities opening up and dropping into it from the surface.
Blue Diamond City[]
Blue Diamond City is the more prominent one presented, and where Blue Diamond is in control of. This was where the Crystal Gems and Mane Six were staying during Season 2.
Yellow Diamond City[]
Yellow Diamond City is the part of the city that Yellow Diamond's in control of. Unlike Blue Diamond City, Yellow Diamond City is more traditional, and kept more to the original rules prior to the Gem War.