The diamonds excrete life juice that makes gems function. Yellowās juice makes them take form, blueās juice makes them have emotions/sentience, and pinks juice keeps them emotionally composed. We have yet to see what whiteās juice does (maybe it gives them power?)
When gems act out or arenāt working to the diamondās standards, they have some of the life juice forcibly removed and they are made into decorations. However, they remove only 2-3 of the diamondās juice.Ā
The yellow wall gems had all but blueās juice removed, cause they can still chat and feel embarrassed, but their bodies are flat due to not having yellowās juice and they donāt talk to others due to not having pinkās juice.
Note how there are empty spaces on the other side, possibly reserved for more gems who act out.
The blue statuesque gems had all but yellowās juice removed, since they have bodies and can blink, but they donāt emote or speak.
Side note: Look at how large they are compared to the others. Maybe these are older gems created when homeworld had more resources?
They keep these gems as decorations to threaten the other gems, keeping them from wanting to rebel out of fear. When harvested, they are kept alive as a punishment, but they are effectively disabled.
This also might be what happened to white/pink diamondās pearl. She had all the juice removed except maybe white or yellows, so she is stuck, unable to move, speak (white diamond is speaking through her), or think. She is effectively a symbol to all other gems that acting out is not acceptable.
Bonus theory: Pinkās room has gems that can quickly build things for her, similar to roseās room. Are there pebbles in roseās room, or is the temple sentient? Does the crystal heart have something to do with that? Maybe the temple is sentient like the walls and statues of homeworld, but it only has pinkās juice. Because of that, it canāt form a body or think, but it can preform actions internally.
Or maybe, as evidenced in the episodeĀ āopen bookā, when the diamondās removed pink pearlās sentience, pink diamond held onto it and put it in the temple, so roseās room contains pink pearlās mind.
Go back and watch s1e46 āopen bookā while picturing connie as pink pearl and steven as pink diamond. Itāll blow your freaking mind.
One way or another... FAMILIAR WAS A GREAT EPISODE!! āØšššš