We learned a few interesting things about the Gem homeworld in these past few episodes. One thing, the extremely rigid hierarchy, is something we already guessed at, but we learned some new interesting factoids about them as well!
Old technology still works
In Too Far we learned that despite huge leaps in defensive technology, the kindergarten injectors were only minorly cosmetically different from rebellion-era drills. Now we have another piece of technology that is not only identical in function but is still actually functioning: the diamond communication line.
Peridot was able to pick up a communicator from an old diamond base, activate it, and have a call with someone, despite it probably being almost five thousand years old. While there are certainly plausible explanations for how a new communicator could have been placed on the Moon well after the end of the rebellion, such explanations aren’t needed: by the time of the rebellion, the homeworld already had an intergalactic empire. The existence of the galaxy warps means they could always communicate by runner, but it would be feasible for long-distance communication to be a completely solved technological problem. If nothing ever improved on the old system, why replace it?
More of that hierarchy
It’s generally been assumed by the fandom that the homeworld was a very regimented place (especially after Back to the Barn), but it wasn’t really until The Answer that we got confirmation—and boy did it come in abundance.
First off, quite quickly, we see everyone’s fearful reaction when the common Gem Ruby stumbled into the aristocratic Sapphire. This accident was clearly a serious breach of etiquette that could have met with severe punishment had Sapphire been prideful rather than fatalistic. Ruby was clearly confused when Sapphire let this pass, so such mercy can’t be too common.
Of course the act of fusion with a different gem type was also reacted to with disgust by everyone assembled in Blue Diamond’s court. Despite the act of fusion being an accident that occurred as Ruby protected her charge, everyone was quite eager to voice outrage and Blue Diamond was in no mood to be merciful. We don’t know if the sentence of being “broken” was meant as a death penalty via shattering or merely a crippling by gem damage (as happened to Lapis Lazuli after she was placed into the mirror), but Sapphire clearly considered it to be cruel.
Plenty of Rubies
It was interesting (though not super-surprising) that Gems of the same type were revealed in The Answer to be essentially interchangeable. Now in addition to the fact that they’re only ever referred to by their gem type, we have Ruby’s testimony about how it feels to fuse her essence with other Rubies: it just feels like being a bigger version of herself. Until The Answer every fusion was very much her own entity, but the affectionately named “Rube Cube” doesn’t seem to recognize herself as a fusion (though we assume she does know she is, since she’d have the memories of the three Rubies that constitute her).
Ruby even goes further when she objects to Sapphire’s own act of self-sacrifice to protect her, saying that nobody should care if she was broken because there are tons of her. The Rubies didn’t seem to be acting as though they all thought of themselves as one and the same, since they were so competitive about who would punch the rebels, but Ruby clearly views herself as disposable so long as there are ample Rubies still out there to carry on the business of punching those that need to be punched.
In the bucket of assorted facts we’ve learned, the one that sits most prominently is that the Gem homeworld is in another galaxy. The law of averages (and the realities of geometric expansion) meant this was likely (otherwise the Gems would be colonizing a world in their own galaxy while having planets in other galaxies), but it’s good to know for sure. Interestingly, the Gems’ home galaxy is visible from Earth with the naked eye; this means that unless the Gems come from a fictional galaxy, there is a very short list of galaxies they could be from.
We also learned how Gems identify themselves to each other. Much like humans might have various ID numbers, Gems have facets and cuts that use both numbers and letters (interestingly enough, the lengths of Peridot’s ID numbers indicate a need of thousands of Peridots per facet, and the need for hundreds of thousands, or maybe even millions, of facets.