The Geode Base is a Gem military base owned by Yellow Diamond. It was first mentioned in How We Met by Fire Agate. It is notable for its "recycle program" although specific details about it are unknown.


The Geode Base is like its namesake: it is a giant geode-like structure with a large opening at the top. It has multiple floors with their own functions and purposes. Two rows of holes are located at the bottom, which are for ships.


Not much information is known about the geode base nor its "recycle program". Fire Agate was sent there as soon as she emerged and remained there for the majority of her service to the Great Diamond Authority.


  • The Gem Base resembling a geode was intentional. Geodes are usually lined up with quartz crystals. The base is mostly comprised of quartz gems.